{"title":"Microphones \u0026 Audio Modules","description":"\u003cp\u003eAudio modules let a project listen, speak, beep or play music.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFor listening:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cstrong\u003eINMP441\u003c\/strong\u003e is a digital I2S MEMS microphone with clean audio, for voice and sound projects on the ESP32. Its supply is 3.63V maximum, so run it from 3.3V.\u003c\/li\u003e\n\u003cli\u003eSimpler \u003cstrong\u003esound sensor modules\u003c\/strong\u003e with an electret mic give an analog level for clap switches and sound-reactive lights.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFor playback:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cstrong\u003eDFPlayer Mini\u003c\/strong\u003e plays MP3 files from a microSD card and drives a small speaker through its built-in amplifier, using a few serial commands.\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003ePAM8403\u003c\/strong\u003e is a small amplifier that drives speakers of a few watts.\u003c\/li\u003e\n\u003cli\u003eThe classic ESP32 can receive Bluetooth audio (A2DP), which turns any speaker into a Bluetooth speaker. The ESP32-C3 and S3 cannot.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHow to choose:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePick an I2S mic for real audio.\u003c\/li\u003e\n\u003cli\u003ePick a sound sensor for loudness triggers.\u003c\/li\u003e\n\u003cli\u003ePick a DFPlayer for stored clips.\u003c\/li\u003e\n\u003cli\u003ePick an amplifier for louder output.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUse buzzers for simple beeps. A passive buzzer can play tones; an active buzzer only beeps.\u003c\/p\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eWhich microphone works with an ESP32?\u003c\/h3\u003e\n\u003cp\u003eThe INMP441 I2S microphone, powered from 3.3V (3.63V maximum).\u003c\/p\u003e\n\u003ch3\u003eHow do I play MP3 files?\u003c\/h3\u003e\n\u003cp\u003eUse a DFPlayer Mini. Put MP3s on a microSD card and send it serial commands.\u003c\/p\u003e\n\u003ch3\u003eCan an ESP32 be a Bluetooth speaker?\u003c\/h3\u003e\n\u003cp\u003eThe classic ESP32 can, using A2DP. The C3 and S3 cannot, because they lack Bluetooth Classic.\u003c\/p\u003e\n\u003ch3\u003eActive or passive buzzer?\u003c\/h3\u003e\n\u003cp\u003eAn active buzzer beeps when powered. A passive buzzer can play tones and melodies.\u003c\/p\u003e\n\u003ch2\u003eGuides\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/guides\/inmp441-esp32-pinout-wiring-code\"\u003eINMP441 + ESP32: Pinout, Wiring Diagram and Working I2S Code\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/guides\/dfplayer-mini-esp32-sound-effects-board-mp3\"\u003eDFPlayer Mini + ESP32: Build a 3-Button Sound Effects Board That Plays MP3s From a microSD Card\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/guides\/esp32-bluetooth-audio-receiver-kit\"\u003eESP32 Bluetooth Audio Receiver Kit: Turn Any Speaker Into a Bluetooth Speaker\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Which microphone works with an ESP32?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The INMP441 I2S microphone, powered from 3.3V (3.63V maximum).\"}}, {\"@type\": \"Question\", \"name\": \"How do I play MP3 files?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use a DFPlayer Mini. Put MP3s on a microSD card and send it serial commands.\"}}, {\"@type\": \"Question\", \"name\": \"Can an ESP32 be a Bluetooth speaker?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The classic ESP32 can, using A2DP. The C3 and S3 cannot, because they lack Bluetooth Classic.\"}}, {\"@type\": \"Question\", \"name\": \"Active or passive buzzer?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"An active buzzer beeps when powered. A passive buzzer can play tones and melodies.\"}}]}\u003c\/script\u003e\n\u003ch2\u003eReference pages on soldr.ai\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/max98357a\"\u003eMAX98357A I2S amplifier\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/dfplayer-mini\"\u003eDFPlayer Mini MP3 player\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/inmp441\"\u003eINMP441 I2S microphone\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/vs1053-mp3-module\"\u003eVS1053 MP3 codec module\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/max9814\"\u003eMAX9814 microphone amplifier\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/pam8403\"\u003ePAM8403 stereo amplifier\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/soldr.ai\/docs\/components\/voice-recognition-module-v3\"\u003eVoice Recognition Module V3\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDescribe your build on \u003ca href=\"https:\/\/app.soldr.ai\"\u003eSoldr\u003c\/a\u003e and it picks the parts, writes and compiles the code, and shows how to wire them. Sign in and get 100 credits free.\u003c\/p\u003e","products":[{"product_id":"voice-recognition-module-v3-with-microphone-for-arduino","title":"Voice Recognition Module V3 with Microphone for Arduino","description":"\u003ch1\u003eVoice Recognition Module V3 with Microphone - Arduino Compatible\u003c\/h1\u003e\u003cp\u003eThe Voice Recognition Module V3 is a compact, self-contained speech recognition board with an integrated microphone, designed for Arduino and other microcontrollers. It can be trained to recognize up to 80 voice commands with high accuracy, enabling hands-free control in your projects. Its UART interface and simple command set make it easy to integrate into home automation, robotics, and assistive technology.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking Voltage\u003c\/td\u003e\n\u003ctd\u003e4.5V - 5.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 40mA (active)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eUART (TTL serial, 9600bps default)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecognition Accuracy\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;99% under ideal conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoice Commands\u003c\/td\u003e\n\u003ctd\u003eUp to 80 trainable commands\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOn-board Microphone\u003c\/td\u003e\n\u003ctd\u003eYes, omnidirectional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/control-appliances-with-your-voice-arduino-and-hc-05-home-automation-kit\"\u003eVoice-controlled home automation system (lights, fans, appliances)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eVoice-activated robot or rover\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-servo-door-lock\"\u003eVoice password door lock for security\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eAssistive device for differently-abled individuals\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis module works with any 5V microcontroller that has a UART, including Arduino Uno, Mega, Nano, and Leonardo. For 3.3V boards like ESP8266 or Raspberry Pi, use a logic level shifter. It's commonly paired with relay modules, motor drivers, or displays for interactive projects.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect VCC to 5V, GND to GND, RX to Arduino pin 3 (software serial), and TX to pin 2. If communication is unreliable, add a 10KΩ pull-up resistor on the RX line. The module draws under 40mA, so standard USB power is sufficient.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Raspberry Pi?\u003c\/summary\u003e\u003cp\u003eYes, but you'll need a logic level shifter to convert the Raspi's 3.3V UART to 5V. Connect the module's RX\/TX through a bidirectional level converter.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eHow do I train custom voice commands?\u003c\/summary\u003e\u003cp\u003eYou can train commands using a USB-to-serial adapter and the manufacturer's PC software, or directly from Arduino code using the provided library and serial commands.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it work in noisy environments?\u003c\/summary\u003e\u003cp\u003eThe module includes noise reduction, but for best accuracy, use it in a quiet space within 1 meter of the speaker. Avoid background music or loud chatter.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444947935597,"sku":"CDN-0087","price":2280.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/voice-recognition-module-v3-with-microphone-for-arduino-3622595.jpg?v=1790780346"},{"product_id":"usb-plug-and-play-desktop-microphone-for-raspberry-pi","title":"USB Plug and Play Desktop Microphone for Raspberry Pi","description":"\u003ch1\u003eUSB Plug and Play Desktop Microphone for Raspberry Pi\u003c\/h1\u003e\n\n\u003cp\u003eCompact USB desktop microphone designed for plug-and-play operation with Raspberry Pi and other single-board computers. Ideal for voice assistant projects, audio recording, VoIP calls, and speech recognition applications. No driver installation required—simply connect to a USB port and start capturing clear audio.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTransducer Type\u003c\/td\u003e\n\u003ctd\u003eElectret Condenser\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePolar Pattern\u003c\/td\u003e\n\u003ctd\u003eOmnidirectional\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003e50 Hz – 16 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensitivity\u003c\/td\u003e\n\u003ctd\u003e-38 dB ± 3 dB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnection\u003c\/td\u003e\n\u003ctd\u003eUSB 2.0 (Type-A plug)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCable Length\u003c\/td\u003e\n\u003ctd\u003e1.5 metres\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-pi-5-voice-assistant-kit\"\u003eVoice-controlled assistant using Google Assistant or Alexa SDK\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/esp32-baby-monitor-kit-with-mpu6050-edge-ai-anomaly-detection\"\u003eDIY intercom or baby monitor with two-way audio\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003ePortable audio recorder for interviews or field notes\u003c\/li\u003e\n  \u003cli\u003eSpeech-to-text transcription system for accessibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks out of the box with any Raspberry Pi running Raspbian OS, as well as Windows, macOS, and Linux computers. Recognized as a standard USB audio device, so it's compatible with Arduino boards that support USB host shields. Pair with a Raspberry Pi Zero for ultra-compact voice projects.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eNo separate wiring needed—just plug the USB connector into a free port on your Raspberry Pi. If using with a Pi Zero, a micro-USB adapter may be required. Ensure your Pi's power supply can handle the additional 100 mA drawn by the microphone to avoid undervoltage issues.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Raspberry Pi 4?\u003c\/summary\u003e\u003cp\u003eYes, it's plug and play on Raspberry Pi 4 running Raspberry Pi OS. No driver installation needed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the microphone require external power?\u003c\/summary\u003e\u003cp\u003eNo, it draws power directly from the USB port. No batteries or external supply required.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this for voice assistant projects?\u003c\/summary\u003e\u003cp\u003eAbsolutely. It works with Google Assistant and Alexa SDKs. For best results, place it within 30 cm of the speaker.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444949148013,"sku":"CDN-0125","price":220.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/usb-plug-and-play-desktop-microphone-for-raspberry-pi-8168514.jpg?v=1790780346"},{"product_id":"piezoelectric-buzzer-26mm-sensor-transducer-compoden","title":"Piezoelectric Buzzer 26mm – Sensor \u0026 Transducer | Compoden","description":"\u003ch1\u003ePiezoelectric Sensor\/Transducer\/Buzzer - 26mm Diameter\u003c\/h1\u003e\n\n\u003cp\u003eThis 26mm piezoelectric disc serves as both a vibration sensor and a sound transducer. Detect knocks or generate tones up to 4kHz. Reliable brass-and-ceramic construction with pre-soldered leads for quick prototyping.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e26mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResonant Frequency\u003c\/td\u003e\n\u003ctd\u003e4.0 ± 0.5kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCapacitance\u003c\/td\u003e\n\u003ctd\u003e20nF ± 30% at 1kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax Input Voltage\u003c\/td\u003e\n\u003ctd\u003e30Vp-p\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eBrass plate, ceramic element\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnection\u003c\/td\u003e\n\u003ctd\u003ePre-soldered wire leads (red\/black)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino alarm system with tone output\u003c\/li\u003e\n  \u003cli\u003eKnock-to-unlock door mechanism\u003c\/li\u003e\n  \u003cli\u003ePiezo contact microphone for vibration logging\u003c\/li\u003e\n  \u003cli\u003eSimple musical keyboard with frequency control\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with 3.3V and 5V boards like Arduino Uno, ESP8266, and Raspberry Pi. For loud sound, drive through a transistor; direct pin connection yields lower volume. As a knock sensor, use analog input with a 1MΩ pull‑down resistor.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eRed lead to signal, black to ground. For sensing, add a 1MΩ–10MΩ resistor between leads to prevent charge buildup. Current draw is minimal; no external power needed for basic beeps.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, it works as a knock sensor (analog pin) or buzzer (digital pin with PWM). Use a 1MΩ resistor for sensing to avoid floating readings.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use it as a microphone?\u003c\/summary\u003e\u003cp\u003eIt captures vibrations rather than clear audio. For basic sound detection, pair with an amplifier circuit; not suitable for voice recording.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it need an external driver?\u003c\/summary\u003e\u003cp\u003eFor loud alerts, drive it through an NPN transistor (e.g., 2N2222) with a base resistor. Direct pin connection works for quiet beeps.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444959142253,"sku":"CDN-0339","price":10.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/piezoelectric-buzzer-26mm-sensor-transducer-compoden-5601059.jpg?v=1790780107"},{"product_id":"piezoelectric-buzzer-35mm-sound-sensor-transducer","title":"Piezoelectric Buzzer 35mm – Sound Sensor \u0026 Transducer","description":"\u003ch1\u003ePiezoelectric Buzzer 35mm – Sound Transducer \u0026amp; Vibration Sensor\u003c\/h1\u003e\u003cp\u003eThe piezoelectric buzzer is a 35mm diameter brass\/ceramic disc that converts electrical signals into sound or mechanical vibrations, and vice versa. It is commonly used for generating alert tones, playing simple melodies, or sensing knocks and vibrations in electronic projects. Its wide operating voltage and resonant frequency make it suitable for battery-powered devices and microcontroller-based circuits.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResonant Frequency\u003c\/td\u003e\n\u003ctd\u003e4.2 ± 0.5 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacitance\u003c\/td\u003e\n\u003ctd\u003e30 nF ± 30%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Input Voltage\u003c\/td\u003e\n\u003ctd\u003e30V p-p\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eBrass substrate with ceramic coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLead Wire Length\u003c\/td\u003e\n\u003ctd\u003e~100 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eArduino alarm system with tone generation\u003c\/li\u003e\n\u003cli\u003eKnock sensor for secure access control\u003c\/li\u003e\n\u003cli\u003eElectronic doorbell with custom melodies\u003c\/li\u003e\n\u003cli\u003eSimple vibration detector for machine monitoring\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis piezo element works with any microcontroller or single-board computer that can generate a square wave signal, such as Arduino Uno, ESP32, or Raspberry Pi. It can be driven directly from a GPIO pin with a small resistor in series, or via a transistor for higher volume. Operating voltage is typically 3V to 30V peak-to-peak, so it is compatible with both 3.3V and 5V logic levels.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect the red wire to the signal pin and the black wire to ground. For sound generation, produce a square wave at the resonant frequency (around 4 kHz) using Arduino's tone() function. When used as a sensor, the piezo generates a small voltage when vibrated; add a 1MΩ resistor in parallel to allow the charge to dissipate and protect the input pin.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, it works directly with Arduino boards. Use the tone() function on a digital pin to generate sounds; no additional driver is needed for low-volume applications.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan this piezo buzzer be used as a vibration sensor?\u003c\/summary\u003e\u003cp\u003eAbsolutely. When subjected to vibration or shock, the piezo disc produces a small voltage that can be read by an analog input pin, making it useful for knock sensors or motion alarms.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the difference between a buzzer and a transducer?\u003c\/summary\u003e\u003cp\u003eA buzzer contains an internal oscillator circuit and only needs DC voltage to produce a fixed tone, while this transducer requires an external AC signal to generate sound, offering more control over the frequency and melody.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53444959699309,"sku":"CDN-0351","price":25.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/piezoelectric-buzzer-35mm-sound-sensor-transducer-1532371.jpg?v=1790780105"},{"product_id":"35mm-piezoelectric-sensortransducerbuzzer-vibrating-disc-for-projects","title":"35mm Piezoelectric Sensor\/Transducer\/Buzzer - Vibrating Disc for Projects","description":"\u003ch1\u003e35mm Piezoelectric Disc – Sounder \u0026amp; Vibration Sensor for DIY Projects\u003c\/h1\u003e\n\n\u003cp\u003eThis 35mm piezoelectric disc works as both a sounder (buzzer) and a vibration sensor. When driven with an AC signal, it produces clear tones for alarms or musical notes. In reverse, it generates a voltage when tapped, making it useful for knock sensors or contact mics. A versatile component for Arduino, Raspberry Pi, and general electronics prototyping.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e35 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResonant Frequency\u003c\/td\u003e\n\u003ctd\u003e2.6 kHz ± 0.5 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCapacitance at 1 kHz\u003c\/td\u003e\n\u003ctd\u003e25 nF ± 30%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax Operating Voltage\u003c\/td\u003e\n\u003ctd\u003e30 Vp-p\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eBrass plate, ceramic element\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e-20°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino tone generator with simple PWM output\u003c\/li\u003e\n  \u003cli\u003eKnock sensor for security systems or interactive projects\u003c\/li\u003e\n  \u003cli\u003eContact microphone to capture acoustic vibrations\u003c\/li\u003e\n  \u003cli\u003eElectronic doorbell or alarm buzzer circuit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks directly with 5V microcontrollers like Arduino Uno, Nano, and Mega. For louder output, pair with a transistor driver circuit from a 3.3V board like ESP32 or Raspberry Pi Pico. The disc can also interface with Raspberry Pi via a simple ADC for vibration sensing.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eFor sound output, connect the ceramic side to a PWM-capable pin through a 1kΩ resistor, and the brass disc to ground. A protective diode is not needed for low-voltage driving. When using as a sensor, wire in parallel with a 1MΩ resistor to bleed off charge.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, connect to any PWM pin with a resistor for buzzer functions, or use as an analog input with a pull-down resistor for knock sensing.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this as a microphone?\u003c\/summary\u003e\u003cp\u003eIt can act as a contact microphone; attach to a surface to detect vibrations, but output voltage is low and needs an amplifier for audio recording.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow loud is this buzzer?\u003c\/summary\u003e\u003cp\u003eWhen driven at resonance with a full 5V square wave, it produces around 80 dB at 10 cm – comparable to a standard sounder but without a built-in oscillator.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445018616173,"sku":"CDN-0727","price":25.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/35mm-piezoelectric-sensortransducerbuzzer-vibrating-disc-for-projects-8836103.jpg?v=1790779926"},{"product_id":"lm393-sound-sensor-module-adjustable-sensitivity-mic","title":"LM393 Sound Sensor Module | Adjustable Sensitivity Mic","description":"\u003ch1\u003eLM393 Sound Sensor Module with Adjustable Threshold\u003c\/h1\u003e\n\u003cp\u003eThe LM393 Sound Sensor Module is a high-sensitivity sound detection board that converts audio signals into digital and analog outputs. It uses an electret microphone and LM393 comparator to trigger a signal when sound exceeds a preset threshold, adjustable via onboard potentiometer. Ideal for clap switches, voice-activated projects, and noise monitoring.\u003c\/p\u003e\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eDigital (DO) and Analog (AO)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMicrophone\u003c\/td\u003e\n\u003ctd\u003eElectret condenser\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eComparator IC\u003c\/td\u003e\n\u003ctd\u003eLM393\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensitivity\u003c\/td\u003e\n\u003ctd\u003eAdjustable via potentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e32 mm × 17 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/clap-switch-kit-with-arduino-uno-learn-pattern-detection-and-debounce\"\u003eClap switch to toggle lights or appliances\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-sound-activated-led-kit\"\u003eSound-activated LED strip animations\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eVoice or sound triggered camera shutter\u003c\/li\u003e\n  \u003cli\u003eNoise level monitor with analog output to microcontroller ADC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module works with any 3.3V or 5V microcontroller, including Arduino Uno, Nano, Mega, ESP8266, ESP32, and Raspberry Pi. The digital output connects directly to a GPIO pin, while the analog output can be read via ADC for varying sound levels.\u003c\/p\u003e\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V (or 3.3V), GND to GND, DO to a digital input pin for threshold-based detection, or AO to an analog input for sound intensity reading. Ensure the potentiometer is adjusted until the DO LED triggers at the desired sound level.\u003c\/p\u003e\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, the LM393 sound sensor module works directly with Arduino Uno at 5V. Connect DO to digital pin 2 and use digitalRead() to detect sound events.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I detect sound intensity with this module?\u003c\/summary\u003e\u003cp\u003eYes, the analog output (AO) provides a voltage proportional to the sound level. Connect to an analog pin and use analogRead() to measure relative loudness.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I adjust the sensitivity?\u003c\/summary\u003e\u003cp\u003eTurn the onboard potentiometer clockwise to increase sensitivity (triggers at quieter sounds) and counterclockwise to decrease sensitivity. The DO LED lights up when sound is detected.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445022613869,"sku":"CDN-0746","price":40.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/lm393-sound-sensor-module-adjustable-sensitivity-mic-2243393.jpg?v=1790779867"},{"product_id":"inmp441-i2s-microphone-module-high-snr-mems-mic-for-esp32","title":"INMP441 I2S Microphone Module — High SNR MEMS Mic for ESP32","description":"\u003ch1\u003eINMP441 I2S MEMS Microphone Module — 61 dBA SNR Digital Output\u003c\/h1\u003e\n\n\u003cp\u003eThe INMP441 is a high-performance MEMS microphone with I2S digital output, offering 61 dBA signal-to-noise ratio and 24-bit audio resolution. It's ideal for voice recognition, sound monitoring, and audio streaming projects using microcontrollers like ESP32. With low power consumption and easy I2S connectivity, it delivers clear, noise-free audio capture for embedded systems.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e1.62V – 3.6V (module typ. 3.3V)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Format\u003c\/td\u003e\n\u003ctd\u003eI2S, 24-bit\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensitivity\u003c\/td\u003e\n\u003ctd\u003e-26 dBFS\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSignal-to-Noise Ratio\u003c\/td\u003e\n\u003ctd\u003e61 dBA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003e60 Hz – 15 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;1.5 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/voice-controlled-home-automation-kit-with-arduino-uno-and-hc-05-bluetoot\"\u003eVoice-controlled home assistant with ESP32 and Alexa\/Google SDK\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-microphone-sound-level-meter\"\u003eIoT sound level meter for real-time noise monitoring and logging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003ePortable high-quality audio recorder with SD card storage\u003c\/li\u003e\n  \u003cli\u003eSecurity alarm that triggers on specific sound patterns like glass breaking\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe INMP441 works with any microcontroller that supports I2S protocol, such as ESP32, ESP8266, Raspberry Pi, STM32, and Arduino boards with appropriate I2S libraries. It pairs seamlessly with 3.3V logic level boards; level shifting might be needed for 5V systems. Common pairings include ESP32 for IoT and Raspberry Pi for advanced audio processing.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VDD to 3.3V, GND to ground, SD (Serial Data) to the I2S data input pin, WS (Word Select) to the I2S LRCLK, and SCK (Serial Clock) to the I2S bit clock. Some modules include an L\/R pin that can be pulled high or low to assign left or right channel. Keep wires short to minimize digital noise.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eThe ATmega328P on Arduino Uno lacks native I2S peripherals; compatibility requires bit‑banging libraries and is limited. It works best with 32‑bit boards like ESP32 or Arduino Zero that have built‑in I2S support.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use two INMP441 mics for stereo recording?\u003c\/summary\u003e\u003cp\u003eYes, two modules can be configured for left and right channels by setting their L\/R pins differently. Ensure your microcontroller's I2S interface supports stereo mode and provides sufficient processing power for dual‑channel audio.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow does I2S improve audio quality over analog mics?\u003c\/summary\u003e\u003cp\u003eI2S delivers digital audio directly, avoiding analog noise and the need for an external ADC. This results in cleaner signals and simpler circuit design, especially in electrically noisy environments.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445051515245,"sku":"CDN-0867","price":240.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/inmp441-i2s-microphone-module-high-snr-mems-mic-for-esp32-2690745.jpg?v=1790779748"},{"product_id":"pam8403-3w-stereo-audio-amplifier-module-5v-class-d","title":"PAM8403 3W Stereo Audio Amplifier Module | 5V Class D","description":"\u003ch1\u003ePAM8403 3W+3W Class D Stereo Audio Amplifier\u003c\/h1\u003e\u003cp\u003eThe PAM8403 is a compact class D stereo audio amplifier module capable of delivering 3 watts per channel into 4-ohm speakers using a 5V supply. It is ideal for battery-powered audio projects, portable speakers, and embedded sound systems where efficiency and minimal heat dissipation are critical.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e2.5V – 5.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Power\u003c\/td\u003e\n\u003ctd\u003e3W+3W (4Ω, 10% THD) at 5V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEfficiency\u003c\/td\u003e\n\u003ctd\u003eUp to 90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal-to-Noise Ratio (SNR)\u003c\/td\u003e\n\u003ctd\u003e80dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Separation\u003c\/td\u003e\n\u003ctd\u003e50dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuiescent Current\u003c\/td\u003e\n\u003ctd\u003e~6mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePortable Bluetooth speaker powered by a 5V USB battery bank\u003c\/li\u003e\n\u003cli\u003eDIY mono or stereo computer speakers for workshops or classrooms\u003c\/li\u003e\n\u003cli\u003eAudio output stage for Raspberry Pi or Arduino music player projects\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-pi-4-retro-gaming-console\"\u003eSmall arcade cabinet or retro gaming console audio system\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThe PAM8403 accepts standard line-level analog audio input and works directly with 3.3V or 5V boards such as Arduino Uno, ESP32, and Raspberry Pi Pico. It pairs well with Bluetooth modules like the HC-05 or CNY-70 for wireless audio streaming. No external amplification is needed for standard AUX or headphone outputs.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect VCC to a clean 5V DC supply, GND to ground, and left\/right input pins to your audio source. Keep input wires short and away from speaker output wires to avoid noise. No external pull-ups or output filters are required.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, simply connect the amplifier’s left\/right input to two Arduino PWM-capable pins for mono audio, or use a dedicated audio shield for stereo. Power the module from the Arduino’s 5V pin if current draw is within limits.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I power it directly from a USB port?\u003c\/summary\u003e\u003cp\u003eAbsolutely. A standard USB port provides 5V, which is ideal for the PAM8403. Many projects use a micro-USB breakout or a phone charger to supply power.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it produce noticeable heat during operation?\u003c\/summary\u003e\u003cp\u003eNo, the PAM8403 is highly efficient and remains cool to the touch even at full volume, eliminating the need for heat sinks in most applications.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445052825965,"sku":"CDN-0870","price":120.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/pam8403-3w-stereo-audio-amplifier-module-5v-class-d-2800930.jpg?v=1790779748"},{"product_id":"3w-8-ohm-speaker-compact-audio-output-for-diy-electronics","title":"3W 8 Ohm Speaker – Compact Audio Output for DIY Electronics","description":"\u003ch1\u003e3W 8 Ohm Speaker – Compact Audio Output for DIY Electronics\u003c\/h1\u003e\u003cp\u003eThe 3W 8 Ohm speaker is a small, versatile audio transducer designed for hobbyist electronics, prototyping, and embedded sound projects. It delivers clear audio output at moderate volumes, making it suitable for alerts, music playback, and voice prompts in microcontroller-based builds. Its standard 8 Ohm impedance ensures broad compatibility with common audio amplifiers.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Rating\u003c\/td\u003e\n\u003ctd\u003e3 Watts (RMS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImpedance\u003c\/td\u003e\n\u003ctd\u003e8 Ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e50 mm (approx.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003e100 Hz – 15 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnet Type\u003c\/td\u003e\n\u003ctd\u003eNeodymium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoice Coil\u003c\/td\u003e\n\u003ctd\u003e13 mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePortable Bluetooth speaker using an amplifier module\u003c\/li\u003e\n\u003cli\u003eArduino-based MP3 player with DFPlayer or similar\u003c\/li\u003e\n\u003cli\u003eCustom doorbell or alarm system with recorded audio\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-pi-5-voice-assistant-kit\"\u003eEmbedded voice assistant with Raspberry Pi and TTS\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eWorks with any microcontroller board that can drive audio through an external amplifier, such as Arduino Uno, ESP32, Raspberry Pi, or dedicated audio modules like DFPlayer Mini. Direct connection to GPIO pins is possible for simple tones, but an amplifier or transistor driver is recommended for full power and quality.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect the speaker terminals to the output of a 3W or lower amplifier module (e.g., PAM8403). If driving from a microcontroller pin, use a 100 µF electrolytic capacitor in series to block DC and protect the coil. Keep wire runs short to minimize interference.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, when used with an external amplifier or a transistor driver. Direct GPIO output may produce weak sound and risk damage.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat voltage is required?\u003c\/summary\u003e\u003cp\u003eThe speaker itself does not have a voltage rating; it's driven by an audio signal. The accompanying amplifier typically needs 3.3V to 5V DC.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I use this for a loud alarm?\u003c\/summary\u003e\u003cp\u003eAt 3W, it produces moderate volume suitable for indoor alerts. For louder applications, consider a higher‑power speaker.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445052891501,"sku":"CDN-0871","price":95.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/3w-8-ohm-speaker-compact-audio-output-for-diy-electronics-3650518.jpg?v=1790779748"},{"product_id":"piezo-buzzer-module-for-arduino-diy-projects-5v-active-buzzer","title":"Piezo Buzzer Module for Arduino \u0026 DIY Projects – 5V Active Buzzer","description":"\u003ch1\u003ePiezo Buzzer – 5V Active Buzzer Module with Built-in Oscillator\u003c\/h1\u003e\n\n\u003cp\u003eThe Piezo Buzzer is an active sound module that produces a sharp, consistent 2.3kHz tone when powered. No external oscillator or complex code is needed—just connect a DC voltage between 3V and 5V. Ideal for alarms, alert systems, and beginner Arduino projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e2.3 ±0.3kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSound Output\u003c\/td\u003e\n\u003ctd\u003e85dB at 10cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePin Count\u003c\/td\u003e\n\u003ctd\u003e2 (VCC, GND)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eActive (with built-in oscillator)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/reed-switch-door-alarm-kit-for-arduino-uno\"\u003eSimple door alarm using a magnetic switch\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eTemperature threshold alert with a thermistor\u003c\/li\u003e\n  \u003cli\u003eTimer notification buzzer for cooking or study\u003c\/li\u003e\n  \u003cli\u003eObstacle warning indicator for a robot\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks directly with Arduino Uno, Mega, and Nano (5V logic). Can be used with ESP32 or Raspberry Pi if powered via 5V pin; the 3.3V logic will trigger it without issues. Pairs well with relay modules, sensor boards, and basic LED circuits.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the long pin (anode) to a digital output on your microcontroller and the short pin (cathode) to GND. This active buzzer draws less than 30mA, so no current-limiting resistor is required for standard 5V operation.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes. Connect the positive pin to any digital I\/O (set as OUTPUT) and the negative pin to GND. No extra components needed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this buzzer play melodies or different tones?\u003c\/summary\u003e\u003cp\u003eNo, this is an active buzzer that produces a fixed 2.3kHz tone. For melodies, use a passive buzzer and control frequency via PWM.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it need an external transistor or driver circuit?\u003c\/summary\u003e\u003cp\u003eNot if powered at 5V. The buzzer’s current draw is under 30mA, which most microcontroller I\/O pins can handle directly.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445057741165,"sku":"CDN-0879","price":45.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/piezo-buzzer-module-for-arduino-diy-projects-5v-active-buzzer-7945257.jpg?v=1790779747"},{"product_id":"passive-buzzer-module-for-arduino-raspberry-pi-3-5v-piezo-buzzer","title":"Passive Buzzer Module for Arduino \u0026 Raspberry Pi - 3-5V Piezo Buzzer","description":"\u003ch1\u003ePassive Buzzer Module – 3-5V Piezo Buzzer for Arduino \u0026amp; Raspberry Pi\u003c\/h1\u003e\n\n\u003cp\u003eThe passive buzzer module is a piezoelectric sounder that requires an external oscillating signal to produce audio tones. Unlike active buzzers, it allows full control over pitch and duration via PWM, making it ideal for melodies, alerts, and user feedback in embedded projects. This compact module includes a built-in transistor driver for safe direct connection to microcontrollers.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResonant Frequency\u003c\/td\u003e\n\u003ctd\u003e2.3kHz ± 0.5kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSound Output\u003c\/td\u003e\n\u003ctd\u003e≥85dB at 10cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e≤30mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePin Interface\u003c\/td\u003e\n\u003ctd\u003eSignal (S), VCC (+), GND (-)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e12mm x 9.5mm (PCB)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eCustom alarm or notification sound for IoT devices\u003c\/li\u003e\n  \u003cli\u003eMusical tone player using Arduino tone() library\u003c\/li\u003e\n  \u003cli\u003eInteractive feedback for button presses or sensor thresholds\u003c\/li\u003e\n  \u003cli\u003eSimple doorbell or timer alert system\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis passive buzzer works with any 3.3V or 5V microcontroller, including Arduino Uno, Nano, Mega, ESP8266, ESP32, and Raspberry Pi (with transistor driver already integrated). Connect directly to a PWM-capable digital pin for tone generation. No extra components needed.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3V or 5V, GND to ground, and Signal to a PWM-capable GPIO pin. The on-board transistor ensures safe current draw; no external resistor required. Use the Arduino tone() function or equivalent to generate frequencies.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, the passive buzzer module connects directly to an Arduino Uno. Use pin 8 or any PWM-capable pin with the tone() function. No extra components required.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I produce multiple tones or melodies?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The passive buzzer relies on an external PWM signal, so you can generate any frequency within its range. Use timing libraries or the tone() function to play melodies or sound effects.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the difference between active and passive buzzer?\u003c\/summary\u003e\u003cp\u003eAn active buzzer has a built-in oscillator and will sound as soon as DC voltage is applied, producing a single tone. A passive buzzer requires an AC signal (PWM) to create sound, giving you control over pitch and patterns.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445067506029,"sku":"CDN-0894","price":45.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/passive-buzzer-module-for-arduino-raspberry-pi-3-5v-piezo-buzzer-6974706.jpg?v=1790779747"},{"product_id":"max9814-microphone-amplifier-module-with-agc","title":"MAX9814 Microphone Amplifier Module with AGC","description":"\u003ch1\u003eMAX9814 Microphone Amplifier with AGC and Electret Mic\u003c\/h1\u003e\n\n\u003cp\u003eThe MAX9814 is a high-performance microphone amplifier with automatic gain control (AGC) and a built-in electret microphone. It is designed to capture clear audio for voice recognition, sound detection, and audio-reactive projects. The AGC adjusts gain automatically to prevent distortion from loud sounds while picking up quiet signals.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e2.7V to 5.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGain Settings\u003c\/td\u003e\n\u003ctd\u003e40dB, 50dB, 60dB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAGC Attack Time\u003c\/td\u003e\n\u003ctd\u003e3ms (fast) to 30ms (slow)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAGC Release Time\u003c\/td\u003e\n\u003ctd\u003e30ms (fast) to 300ms (slow)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Impedance\u003c\/td\u003e\n\u003ctd\u003e100Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMicrophone Bias\u003c\/td\u003e\n\u003ctd\u003e2V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-sound-reactive-led-visualiser\"\u003eSound-reactive LED strips or wearable lights\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/voice-controlled-home-automation-kit-with-arduino-uno-and-hc-05-bluetoot\"\u003eVoice-controlled home automation or robot\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-audio-spectrum-analyser-on-oled\"\u003eAudio spectrum visualizer with an OLED display\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/clap-switch-kit-with-arduino-uno-learn-pattern-detection-and-debounce\"\u003eClap switch or noise-activated alarm\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module works with any 3.3V or 5V microcontroller including Arduino Uno, Nano, ESP32, and Raspberry Pi Pico. The analog output connects directly to an ADC input. The AGC ensures consistent levels across different sound environments.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3–5V, GND to ground, and OUT to an analog pin. No pull-up resistor is needed. Keep the mic away from noisy power supply traces. For best results, place a 10µF capacitor between VCC and GND near the module.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, the module operates at 5V and the analog output can be read by any Uno analog pin. No additional components are needed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I adjust the gain manually?\u003c\/summary\u003e\u003cp\u003eThe MAX9814 gain is set by connecting the gain pin to VCC, GND, or leaving it unconnected for 40dB, 50dB, or 60dB respectively.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it work with Raspberry Pi?\u003c\/summary\u003e\u003cp\u003eRaspberry Pi lacks an analog input, so you'll need an ADC like the MCP3008. The module's output is analog, so an external ADC is required.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445077008749,"sku":"CDN-0924","price":240.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/max9814-microphone-amplifier-module-with-agc-1074127.jpg?v=1790779685"},{"product_id":"dfplayer-mini-mp3-player-module-serial-control-microsd","title":"DFPlayer Mini MP3 Player Module – Serial Control, MicroSD","description":"\u003ch1\u003eDFPlayer Mini MP3 Player Module with MicroSD Support and Serial Control\u003c\/h1\u003e\n\n\u003cp\u003eThe DFPlayer Mini is a compact, low-cost MP3 player module that integrates a microSD card reader and a 3W amplifier. It decodes MP3, WAV, and WMA files and can be controlled via simple serial commands from a microcontroller like Arduino. This module is perfect for adding high-quality audio playback to your projects, such as voice alerts, music players, or interactive sound effects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V - 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAudio Output\u003c\/td\u003e\n\u003ctd\u003e3W into 4Ω speaker, or line-out\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupported Formats\u003c\/td\u003e\n\u003ctd\u003eMP3, WAV, WMA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003emicroSD up to 32GB (FAT16\/FAT32)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eControl Interface\u003c\/td\u003e\n\u003ctd\u003eUART (serial) at 9600 bps default\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY MP3 player with playback controls\u003c\/li\u003e\n  \u003cli\u003eVoice prompt system for security or automation\u003c\/li\u003e\n  \u003cli\u003eInteractive sound effects for props or toys\u003c\/li\u003e\n  \u003cli\u003eBackground music player for exhibitions or kiosks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with Arduino Uno, Nano, Mega, ESP32, and Raspberry Pi (using UART). Voltage compatible with 5V and 3.3V logic. Pair with small speakers or headphones via line-out.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V, GND to GND, TX to microcontroller RX, RX to microcontroller TX. Use a 1K resistor on RX line if using 5V microcontroller to avoid damage. Module includes onboard antenna for minimal noise.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, it uses serial communication; connect DFPlayer's TX to Arduino's RX (pin 0) and RX to TX (pin 1). Use the SoftwareSerial library if needed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I load audio files?\u003c\/summary\u003e\u003cp\u003eSimply copy MP3\/WAV files onto a FAT16\/FAT32 formatted microSD card, insert, and they will be accessible by file number or name via serial commands.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it drive a speaker directly?\u003c\/summary\u003e\u003cp\u003eYes, it has a built-in 3W amplifier; connect a 4Ω or 8Ω speaker to the SPK pins. For louder sound, use an external amplifier via line-out.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445082087789,"sku":"CDN-0942","price":240.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/dfplayer-mini-mp3-player-module-serial-control-microsd-5073684.jpg?v=1790779627"},{"product_id":"vs1053-mp3-recording-module-for-arduino-uno-development-board","title":"VS1053 Audio Codec Module for Arduino (MP3 Playback, Ogg\/ADPCM Recording)","description":"\u003ch1\u003eVS1053 Audio Codec Development Board Module for Arduino Uno (MP3 Playback, Ogg\/ADPCM Recording)\u003c\/h1\u003e\n\u003cp\u003eThis module is a compact audio processing board based on the VS1053 IC, providing MP3, WAV and OGG playback plus IMA ADPCM, PCM and Ogg Vorbis (plugin) recording for Arduino and similar microcontrollers. It enables direct voice and audio recording to microSD without heavy CPU load. The onboard SPI interface and integrated codec make it ideal for adding high-quality sound to embedded projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eIC\u003c\/td\u003e\n\u003ctd\u003eVS1053B\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAudio Formats\u003c\/td\u003e\n\u003ctd\u003ePlay: MP3, WAV, OGG. Record: IMA ADPCM \/ PCM WAV, Ogg Vorbis (plugin). No MP3 recording.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRecording Storage\u003c\/td\u003e\n\u003ctd\u003emicroSD card slot (up to 32GB, FAT32)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eSPI (MISO, MOSI, SCK, CS)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003e5V DC (onboard 3.3V LDO)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAudio I\/O\u003c\/td\u003e\n\u003ctd\u003eOnboard electret mic, 3.5mm MIC jack, 3.5mm SPK output jack (headphone level)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/voice-recorder-kit-esp32-oled-build-digital-wav-audio-logger\"\u003ePortable voice recorder with timestamp logging\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eStandalone MP3 playlist player from microSD\u003c\/li\u003e\n  \u003cli\u003eSound effects board for cosplay props or animatronics\u003c\/li\u003e\n  \u003cli\u003eReal-time audio alert system for IoT sensor thresholds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe module works directly with Arduino Uno, Nano, and Mega using standard SPI pins. It requires a 5V supply but communicates at 3.3V logic—the onboard level shifters manage voltage translation. Compatible with the Adafruit VS1053 library and Arduino IDE. It also functions with ESP8266\/ESP32 boards with minor wiring adjustments.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V and GND to ground. Wire MISO, MOSI, SCK to Arduino pins 12, 11, 13 respectively; CS to a digital pin like 10. Insert a FAT32-formatted microSD card. The module draws up to 100mA during recording; use a stable USB or external 5V supply to avoid voltage droops.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, it works with standard SPI and the VS1053 plugin. You can use the Adafruit breakout library for straightforward recording and playback examples.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it need an external microphone?\u003c\/summary\u003e\u003cp\u003eNo, the board has an onboard electret microphone for recording. You can also connect an external mic via the 3.5mm MIC jack.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it record directly to microSD?\u003c\/summary\u003e\u003cp\u003eYes, it can record to a microSD card without a computer, as IMA ADPCM or PCM WAV, or Ogg Vorbis with the VLSI plugin. The VS1053 does not encode MP3.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445109743981,"sku":"CDN-0436","price":860.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/vs1053-mp3-recording-module-for-arduino-uno-development-board-7707780.jpg?v=1790779507"},{"product_id":"analog-sound-sensor-microphone-module-compoden","title":"Analog Sound Sensor Microphone Module | Compoden","description":"\u003ch1\u003eAnalog Sound Sensor Microphone Module\u003c\/h1\u003e\n\u003cp\u003eThe Analog Sound Sensor Microphone Module captures environmental sound and converts it into a proportional analog voltage. It uses an onboard electret microphone and amplifier, outputting a continuous signal ideal for real-time sound level monitoring. With a built-in sensitivity adjustment, you can fine-tune the response for whisper‑quiet or loud environments.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eAnalog voltage (0V to VCC)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMicrophone\u003c\/td\u003e\n\u003ctd\u003eElectret condenser\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensitivity Adjustment\u003c\/td\u003e\n\u003ctd\u003eOnboard potentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003e50 Hz – 10 kHz (approx.)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e32 mm × 17 mm × 10 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-sound-activated-led-kit\"\u003eSound-activated LED or relay switch\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/voice-home-automation-kit-with-arduino-uno-and-hc-05\"\u003eVoice clap detection for home automation\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eAmbient sound level monitor with serial output\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/music-reactive-3d-led-sculpture-kit-with-arduino-mega\"\u003eSimple music-reactive LED visualizer\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with any microcontroller that has an analog input: Arduino Uno, Nano, Mega, ESP8266, ESP32, Raspberry Pi Pico (with ADC), and STM32. Connect VCC to 3.3V or 5V, GND to ground, and OUT to an analog pin. Logic levels match both 3.3V and 5V systems without extra level shifting.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the VCC pin to a 3.3V or 5V power rail, GND to ground, and the OUT pin directly to an analog input on your board. The analog voltage ranges from 0V in silence to nearly VCC for loud sounds. Start with the potentiometer at mid‑range; turn it to adjust output gain up or down depending on ambient noise. Avoid powering the module from a digital I\/O pin that cannot supply sufficient current.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino Uno?\u003c\/summary\u003e\u003cp\u003eYes, directly. Connect VCC to 5V, GND to GND, and OUT to any analog pin (e.g., A0). Read the analog value with analogRead().\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I detect specific sound frequencies with this module?\u003c\/summary\u003e\u003cp\u003eThe analog output represents overall sound amplitude only. To detect specific frequencies you would need a microphone module with digital I2S output and perform Fast Fourier Transform (FFT) analysis in code.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I adjust the sensitivity?\u003c\/summary\u003e\u003cp\u003eLocate the small blue potentiometer on the board. Turn it clockwise to increase output gain (more sensitive) or counterclockwise to reduce it. Adjust while monitoring the analog reading for your target noise level.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445122916717,"sku":"CDN-0639","price":120.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/analog-sound-sensor-microphone-module-compoden-9818106.jpg?v=1790779506"},{"product_id":"active-buzzer-dc-3-5v-85db-sounder-module-for-arduino-raspberry-pi","title":"Active Buzzer DC 3-5V 85dB Sounder Module for Arduino \u0026 Raspberry Pi","description":"\u003ch1\u003eActive Buzzer\u003c\/h1\u003e\n\u003cp\u003eThis active buzzer generates a continuous tone when DC voltage is applied—no external oscillator needed. Just power it with 3–5 V to get an 85 dB alert at 2.3 kHz, perfect for alarms, timers, and status indicators in embedded projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3–5 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e≤30 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSound Output\u003c\/td\u003e\n\u003ctd\u003e85 dB at 10 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResonant Frequency\u003c\/td\u003e\n\u003ctd\u003e2.3 ± 0.3 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e12 mm x 9.5 mm (⌀ x H)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePin Spacing\u003c\/td\u003e\n\u003ctd\u003e6.5 mm (2-pin header)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-countdown-timer\"\u003eCountdown timer with audible beep\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-fridge-door-open-alarm\"\u003eDoor-open alarm for home security\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eTemperature threshold alert (combine with LM35)\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-simon-says-memory-game\"\u003eSimon Says memory game with sound feedback\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks directly with Arduino Uno, Nano, Mega, and Raspberry Pi GPIO (via transistor for higher current). Accepts 3.3 V logic level for control—simply connect the positive pin to the MCU pin through a current-limiting resistor (100 Ω). Common pairings include Arduino tone-generating projects or as a simple alert alongside LCDs and sensors.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eRed wire to VCC (3–5 V), black to GND. Drive the buzzer directly from an Arduino digital pin (set HIGH to sound) with a 100 Ω resistor in series. Max current draw is 30 mA; do not exceed 5 V or continuous operation beyond 30 seconds may affect longevity.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\n\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-7 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, the active buzzer works with any Arduino board. Connect the positive lead to a digital pin (with a series 100 Ω resistor) and the negative to GND. Drive the pin HIGH to sound the buzzer; no tone() library needed.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I control the volume?\u003c\/summary\u003e\u003cp\u003eVolume is fixed. To reduce loudness, you can add a series resistor (100–220 Ω) or use PWM, though the tone may distort. For adjustable volume, consider a passive buzzer with a potentiometer.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill this work with 3.3 V logic?\u003c\/summary\u003e\u003cp\u003eYes, the buzzer activates reliably from 3 V, so it works with 3.3 V boards like Raspberry Pi Pico, ESP8266, or STM32. For Raspberry Pi GPIO, use a transistor driver because the pin current is limited.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445137236333,"sku":"CDN-0850","price":45.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/active-buzzer-dc-3-5v-85db-sounder-module-for-arduino-raspberry-pi-8756165.jpg?v=1790779446"},{"product_id":"ky-038-sound-sensor-module-microphone-module-for-arduino","title":"KY-038 Sound Sensor Module – Microphone Module for Arduino","description":"\u003ch1\u003eKY-038 Sound Sensor Module – Analog \u0026amp; Digital Microphone Detector\u003c\/h1\u003e\n\n\u003cp class=\"product-lede\"\u003eThe KY-038 is a sound detection sensor module with an electret condenser microphone and LM393 comparator, providing both analog and digital outputs, ideal for Arduino, ESP32, and Raspberry Pi sound-activated projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensor Type\u003c\/td\u003e\n\u003ctd\u003eElectret condenser microphone with amplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eComparator IC\u003c\/td\u003e\n\u003ctd\u003eLM393 dual differential comparator (for digital output)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003eAnalog (AO) voltage proportional to sound intensity; Digital (DO) TTL output (HIGH\/LOW based on threshold)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAdjustable Sensitivity\u003c\/td\u003e\n\u003ctd\u003eOn‑board potentiometer to set digital trigger threshold\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSignal Indicator\u003c\/td\u003e\n\u003ctd\u003eBuilt‑in LED lights when sound exceeds threshold (for digital)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eApprox. 40 mm × 20 mm × 15 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApprox. 5 g\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/clap-switch-kit-with-arduino-uno-learn-pattern-detection-and-debounce\"\u003e\n\u003cstrong\u003eClap Switch:\u003c\/strong\u003e Build a simple clap‑activated LED switch using Arduino Uno, sensor digital output, and a relay module.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-microphone-sound-level-meter\"\u003e\n\u003cstrong\u003eNoise Level Monitor:\u003c\/strong\u003e Create an IoT sound level meter with ESP32 sending analog data to Blynk cloud dashboard.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSound-Activated Alarm:\u003c\/strong\u003e Program a Raspberry Pi to send email alerts when sound threshold exceeded, using Python and GPIO.\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/sound-sensor-kit-with-arduino-uno-real-time-led-brightness-control\"\u003e\n\u003cstrong\u003eCBSE Physics Project:\u003c\/strong\u003e Study the variation of sensor output with distance and sound intensity, using multimeter and function generator.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eB.Tech Final Year Project:\u003c\/strong\u003e Design a smart home noise classification system using KY-038 with Arduino and machine learning on edge (TinyML) to identify door knocks vs. ambient noise.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003ctable class=\"compat-table\"\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003cth\u003eCompatible\u003c\/th\u003e\n\u003cth\u003eConnection\u003c\/th\u003e\n\u003cth\u003eLibrary \/ Method\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eDigital: D2, Analog: A0\u003c\/td\u003e\n\u003ctd\u003edigitalRead() \/ analogRead()\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Nano\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eDigital: D2, Analog: A0\u003c\/td\u003e\n\u003ctd\u003edigitalRead() \/ analogRead()\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Mega 2560\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eDigital: 2, Analog: A0\u003c\/td\u003e\n\u003ctd\u003edigitalRead() \/ analogRead()\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP8266 NodeMCU\u003c\/td\u003e\n\u003ctd\u003eYes with condition\u003c\/td\u003e\n\u003ctd\u003eDigital: any GPIO; Analog: A0 (voltage divider required for 5V output)\u003c\/td\u003e\n\u003ctd\u003edigitalRead() \/ analogRead(A0)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP32 Dev Board\u003c\/td\u003e\n\u003ctd\u003eYes if powered with 3.3V\u003c\/td\u003e\n\u003ctd\u003eDigital: any GPIO; Analog: ADC pin (GPIO34–39)\u003c\/td\u003e\n\u003ctd\u003edigitalRead() \/ analogRead()\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi Pico\u003c\/td\u003e\n\u003ctd\u003eYes (use 3.3V power)\u003c\/td\u003e\n\u003ctd\u003eDigital: GP15, Analog: ADC0\u003c\/td\u003e\n\u003ctd\u003edigitalRead() \/ analogRead() (Arduino‑Pico core)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi 4 \/ 5\u003c\/td\u003e\n\u003ctd\u003eYes (digital only)\u003c\/td\u003e\n\u003ctd\u003eDigital: GPIO17; Analog requires MCP3008 ADC\u003c\/td\u003e\n\u003ctd\u003eRPi.GPIO \/ spidev for external ADC\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWiring and Interface Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 3.3V or 5V, GND to ground. Digital output connects to a digital GPIO pin; analog output connects to an analog input pin (ADC). For boards with 3.3V logic, power the module with 3.3V to avoid level shifting on analog output.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"faq\"\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eWhat is the difference between the DO and AO pins on KY-038?\u003c\/h3\u003e\n    \u003cp\u003eThe DO (digital output) provides a high\/low signal based on the threshold set by the potentiometer, ideal for simple on\/off sound detection. The AO (analog output) outputs a continuous voltage proportional to sound intensity, allowing you to measure sound levels precisely.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eCan I use the KY-038 for voice recognition?\u003c\/h3\u003e\n    \u003cp\u003eNo, the KY-038 outputs only amplitude-based signals and cannot distinguish specific words or frequencies. For voice recognition, consider a dedicated MEMS microphone with I2S interface and a microcontroller with processing power.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53454857175405,"sku":"CDN-0957","price":55.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/ky-038-sound-sensor-module-microphone-module-for-arduino-5708473.png?v=1790779387"},{"product_id":"3w-8-ohm-speaker-for-arduino-audio-projects-dfplayer-mini","title":"3W 8 Ohm Speaker for Arduino Audio Projects \u0026 DFPlayer Mini","description":"\u003ch1\u003e3W 8 Ohm Speaker for Arduino Audio \u0026amp; DFPlayer Mini\u003c\/h1\u003e\n\n\u003cp class=\"product-lede\"\u003eA compact 3-watt 8-ohm speaker designed for clear audio output in Arduino, ESP32, and Raspberry Pi projects; pairs directly with the DFPlayer Mini module for simple sound playback and voice alerts.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003ePower Rating\u003c\/th\u003e\n\u003ctd\u003e3 W (nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eImpedance\u003c\/th\u003e\n\u003ctd\u003e8 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFrequency Response\u003c\/th\u003e\n\u003ctd\u003e200 Hz – 15 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSensitivity\u003c\/th\u003e\n\u003ctd\u003e85 dB (1W\/1m)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCone Diameter\u003c\/th\u003e\n\u003ctd\u003e40 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMagnet Type\u003c\/th\u003e\n\u003ctd\u003eFerrite\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eConnector\u003c\/th\u003e\n\u003ctd\u003e2-pin JST PH 2.0 (8 cm wire)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e40 mm (diameter) x 5 mm (thickness)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMini Doorbell:\u003c\/strong\u003e Use an Arduino Uno with a DFPlayer Mini and button to play a custom doorbell chime through this speaker.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWiFi Voice Notifier:\u003c\/strong\u003e Connect an ESP32 to a motion sensor and trigger pre-recorded voice alerts heard on the speaker.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePortable Audio Player:\u003c\/strong\u003e Build a Raspberry Pi music player that outputs to this compact speaker for personal listening.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSound-Activated Alarm:\u003c\/strong\u003e CBSE physics project using a microphone module, Arduino, and speaker to trigger an alarm on loud noise.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePublic Transport Audio Guide:\u003c\/strong\u003e B.Tech final year project using NFC tags to identify bus stops and announce them through the speaker for visually impaired commuters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003ctable class=\"compat-table\"\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003cth\u003eCompatible\u003c\/th\u003e\n\u003cth\u003eConnection\u003c\/th\u003e\n\u003cth\u003eLibrary \/ Method\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003eYes with DFPlayer Mini\u003c\/td\u003e\n\u003ctd\u003eD10 (TX), D11 (RX) SoftwareSerial\u003c\/td\u003e\n\u003ctd\u003eDFRobotDFPlayerMini\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Nano\u003c\/td\u003e\n\u003ctd\u003eYes with DFPlayer Mini\u003c\/td\u003e\n\u003ctd\u003eD10 (TX), D11 (RX) SoftwareSerial\u003c\/td\u003e\n\u003ctd\u003eDFRobotDFPlayerMini\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Mega 2560\u003c\/td\u003e\n\u003ctd\u003eYes with DFPlayer Mini\u003c\/td\u003e\n\u003ctd\u003eSerial1 (D18 TX, D19 RX) or D10,D11\u003c\/td\u003e\n\u003ctd\u003eDFRobotDFPlayerMini\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP8266 NodeMCU\u003c\/td\u003e\n\u003ctd\u003eYes with DFPlayer Mini\u003c\/td\u003e\n\u003ctd\u003eGPIO2 (TX), GPIO15 (RX) SoftwareSerial\u003c\/td\u003e\n\u003ctd\u003eDFRobotDFPlayerMini\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP32 Dev Board\u003c\/td\u003e\n\u003ctd\u003eYes with DFPlayer Mini\u003c\/td\u003e\n\u003ctd\u003eGPIO17 (TX2), GPIO16 (RX2) or any SoftwareSerial pins\u003c\/td\u003e\n\u003ctd\u003eDFRobotDFPlayerMini\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi Pico\u003c\/td\u003e\n\u003ctd\u003eYes with DFPlayer Mini\u003c\/td\u003e\n\u003ctd\u003eGP0 (TX), GP1 (RX) UART\u003c\/td\u003e\n\u003ctd\u003eDFRobotDFPlayerMini (Arduino core)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi 4 \/ 5\u003c\/td\u003e\n\u003ctd\u003eYes with DFPlayer Mini\u003c\/td\u003e\n\u003ctd\u003eGPIO14 (TX), GPIO15 (RX) \/dev\/serial0\u003c\/td\u003e\n\u003ctd\u003ePython serial + DFPlayer protocol\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWiring and Interface Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the speaker’s + and – terminals to the SPK_1 and SPK_2 outputs of the DFPlayer Mini module. The speaker operates at amplifier-level signals; never connect it directly to a 3.3V or 5V GPIO pin. For best sound, mount the speaker in a small enclosure to improve bass and volume.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"faq\"\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eCan I connect this speaker directly to Arduino without an amplifier?\u003c\/h3\u003e\n    \u003cp\u003eNo, Arduino GPIO pins cannot drive a passive speaker. You must use an amplifier like the DFPlayer Mini or a transistor circuit to power the speaker.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eHow loud is this 3W speaker for a typical classroom or desk setup?\u003c\/h3\u003e\n    \u003cp\u003eThe 3W output provides clear audio for personal use or a quiet classroom; for noisy areas, a higher‑wattage speaker or additional amplification is recommended.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53454857634157,"sku":"CDN-0963","price":300.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/3w-8-ohm-speaker-for-arduino-audio-projects-dfplayer-mini-6218530.jpg?v=1790779386"},{"product_id":"max4466-microphone-amplifier-module-with-agc-for-arduino-projects","title":"MAX4466 Microphone Amplifier Module with AGC for Arduino Projects","description":"\u003ch1\u003eMAX4466 Electret Microphone Amplifier Module with AGC\u003c\/h1\u003e\n\n\u003cp class=\"product-lede\"\u003eThe MAX4466 module is a compact electret microphone amplifier with adjustable gain and built-in AGC, providing clean audio output for Arduino, ESP32, and other microcontroller projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e2.4 V to 5.5 V DC – Confirmed from manufacturer datasheet\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGain Range\u003c\/td\u003e\n\u003ctd\u003e25× to 125× (adjustable via onboard trim pot) – Typical for this component category\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eAnalog, AC‑coupled – Confirmed from manufacturer datasheet\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003e20 Hz to 20 kHz – Typical for this component category\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSignal‑to‑Noise Ratio\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;60 dB (A‑weighted) – Typical for this component category\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOnboard Microphone\u003c\/td\u003e\n\u003ctd\u003eElectret condenser, omnidirectional – Confirmed from manufacturer datasheet\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eModule Dimensions\u003c\/td\u003e\n\u003ctd\u003e22 mm × 14 mm (approx) – From user reports and common usage\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCurrent Consumption\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;3 mA – Inferred from similar module designs\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-sound-activated-led-kit\"\u003e\n\u003cstrong\u003eSound‑activated LED:\u003c\/strong\u003e Create a beginner‑friendly Arduino project that lights up LEDs when you clap or speak.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWi‑Fi noise monitor:\u003c\/strong\u003e Use an ESP32 to stream live sound levels to a Blynk dashboard for smart room monitoring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAudio visualizer:\u003c\/strong\u003e Connect to a Raspberry Pi (with external ADC) and run a Python script to plot real‑time waveforms.\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/clap-switch-kit-with-arduino-uno-learn-pattern-detection-and-debounce\"\u003e\n\u003cstrong\u003eClap switch (CBSE):\u003c\/strong\u003e Build a practical physics investigation demonstrating sound‑triggered circuits, perfect for ATL Tinkering Labs.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmart India Hackathon project:\u003c\/strong\u003e Integrate into an assistive device that recognizes alarm sounds for hearing‑impaired individuals.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003ctable class=\"compat-table\"\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003cth\u003eCompatible\u003c\/th\u003e\n\u003cth\u003eConnection\u003c\/th\u003e\n\u003cth\u003eLibrary \/ Method\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eOUT → A0\u003c\/td\u003e\n\u003ctd\u003eanalogRead()\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Nano\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eOUT → A0\u003c\/td\u003e\n\u003ctd\u003eanalogRead()\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Mega 2560\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eOUT → A0\u003c\/td\u003e\n\u003ctd\u003eanalogRead()\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP8266 NodeMCU\u003c\/td\u003e\n\u003ctd\u003eYes with condition\u003c\/td\u003e\n\u003ctd\u003eOUT → A0 (0‑1 V input)\u003c\/td\u003e\n\u003ctd\u003eanalogRead(); may need voltage divider\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP32 Dev Board\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eOUT → any ADC pin (e.g., 34)\u003c\/td\u003e\n\u003ctd\u003eanalogRead()\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi Pico\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eOUT → GP26 (ADC0)\u003c\/td\u003e\n\u003ctd\u003eMicroPython ADC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi 4 \/ 5\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003ctd\u003eRequires external ADC (e.g., MCP3008)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWiring and Interface Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to a 3.3 V or 5 V supply, GND to ground, and OUT to the analog input of your microcontroller. The onboard trim potentiometer lets you adjust gain from 25× to 125× — turn clockwise to increase sensitivity. For best results, keep wires short and use the onboard voltage regulator to avoid power‑supply noise in your audio signal.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"faq\"\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eMy MAX4466 output seems noisy, how do I fix it?\u003c\/h3\u003e\n    \u003cp\u003eEnsure a clean power supply and use short, shielded cables. Adjust the gain trim pot to avoid clipping and keep the module away from noisy components like motors.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eCan I use this module for voice recognition with Raspberry Pi?\u003c\/h3\u003e\n    \u003cp\u003eYes, but you’ll need a USB sound card or an external ADC since the Raspberry Pi lacks analog inputs. The module provides good analog output for sampling.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53454858289517,"sku":"CDN-0973","price":180.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/max4466-microphone-amplifier-module-with-agc-for-arduino-projects-1859460.jpg?v=1790779386"},{"product_id":"35mm-trs-audio-jack-stereo-socket-for-audio-electronics-projects","title":"3.5mm TRS Audio Jack – Stereo Socket for Audio Electronics Projects","description":"\u003ch1\u003e3.5mm TRS Audio Jack – Stereo Socket for Audio Electronics Projects\u003c\/h1\u003e\n\n\u003cp class=\"product-lede\"\u003eThe 3.5mm TRS audio jack is a stereo socket connector for adding wired audio input\/output to Arduino, ESP32, Raspberry Pi, and other DIY electronics projects.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003e3.5mm (1\/8″) TRS stereo jack socket\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGender \/ Style\u003c\/td\u003e\n\u003ctd\u003eFemale, panel-mount or through-hole soldering\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eNumber of Pins\u003c\/td\u003e\n\u003ctd\u003e3 (Tip, Ring, Sleeve) or 5 with switch (variant dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eContact Resistance\u003c\/td\u003e\n\u003ctd\u003e≤ 30 mΩ (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInsulation Resistance\u003c\/td\u003e\n\u003ctd\u003e≥ 100 MΩ at 500 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRated Voltage \/ Current\u003c\/td\u003e\n\u003ctd\u003e30 V DC \/ 0.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMating Plug Diameter\u003c\/td\u003e\n\u003ctd\u003e3.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMounting Hole\u003c\/td\u003e\n\u003ctd\u003e~6 mm diameter (for panel mount)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eArduino Beginner:\u003c\/strong\u003e Build a simple tone generator using tone() and a capacitor filter to play melodies through headphones.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eESP32 IoT:\u003c\/strong\u003e Create a Wi‑Fi streaming radio player that outputs stereo sound via the onboard DAC to this socket.\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-pi-4-retro-gaming-console\"\u003e\n\u003cstrong\u003eRaspberry Pi Retro:\u003c\/strong\u003e Add a dedicated headphone jack for a RetroPie gaming console using PWM audio output on GPIO 18.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-atl-breadboard-basics-lab-kit\"\u003e\n\u003cstrong\u003eCBSE\/ATL Lab:\u003c\/strong\u003e Assemble a transistor amplifier on a breadboard and use the socket to safely connect an external speaker.\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-esp32-s3-fft-audio-spectrum\"\u003e\n\u003cstrong\u003eB.Tech \/ Smart India Hackathon:\u003c\/strong\u003e Design a portable audio spectrum analyser with FFT algorithm, outputting live monitoring to a headphone jack.\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003ctable class=\"compat-table\"\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePlatform\u003c\/th\u003e\n\u003cth\u003eCompatible\u003c\/th\u003e\n\u003cth\u003eConnection\u003c\/th\u003e\n\u003cth\u003eLibrary \/ Method\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Uno R3\u003c\/td\u003e\n\u003ctd\u003eYes with condition\u003c\/td\u003e\n\u003ctd\u003ePin 5 or 6 (PWM) to Tip via capacitor\u003c\/td\u003e\n\u003ctd\u003etoneAC, direct PWM + RC filter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Nano\u003c\/td\u003e\n\u003ctd\u003eYes with condition\u003c\/td\u003e\n\u003ctd\u003eD5 or D6 (PWM) to Tip via capacitor\u003c\/td\u003e\n\u003ctd\u003etoneAC, direct PWM + RC filter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArduino Mega 2560\u003c\/td\u003e\n\u003ctd\u003eYes with condition\u003c\/td\u003e\n\u003ctd\u003ePin 9 or 10 (PWM) to Tip via capacitor\u003c\/td\u003e\n\u003ctd\u003etoneAC, direct PWM + RC filter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP8266 NodeMCU\u003c\/td\u003e\n\u003ctd\u003eYes with condition\u003c\/td\u003e\n\u003ctd\u003eI2S (D1, D2, D3) or PWM (D2)\u003c\/td\u003e\n\u003ctd\u003eESP8266Audio, I2S\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eESP32 Dev Board\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eGPIO25 (DAC1) or GPIO26 (DAC2) to Tip\/Ring\u003c\/td\u003e\n\u003ctd\u003eESP32 audio library, Audio.h\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi Pico\u003c\/td\u003e\n\u003ctd\u003eYes with condition\u003c\/td\u003e\n\u003ctd\u003eGP0 to GP28 (PWM) with low pass filter\u003c\/td\u003e\n\u003ctd\u003epico-extras audio_pwm library\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRaspberry Pi 4 \/ 5\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eGPIO 18 (PWM0) via filter, or I2S\u003c\/td\u003e\n\u003ctd\u003ePiGPIO, WiringPi, ALSA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWiring and Interface Notes\u003c\/h2\u003e\n\u003cp\u003eFor stereo output, connect the tip to the left audio channel and the ring to the right channel, sharing a common ground on the sleeve. Always place a 10–100 µF coupling capacitor in series with the signal line to block DC from microcontroller pins. When panel‑mounting, tighten the nut by hand plus a quarter‑turn with pliers – overtightening may crack the plastic body.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"faq\"\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eCan I connect Arduino output directly to this jack for headphones?\u003c\/h3\u003e\n    \u003cp\u003eNo, Arduino pins output 0 V\/5 V square waves. Add an RC low‑pass filter (e.g., 1 kΩ + 10 µF) and a coupling capacitor to produce safe audio levels.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"faq-item\"\u003e\n    \u003ch3\u003eIs this socket suitable for 3D printed enclosures?\u003c\/h3\u003e\n    \u003cp\u003eYes, the threaded barrel and nut are designed for panel mounting. Drill a 6 mm hole, solder wires first, then install the nut to avoid stress on the solder joints.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53454858912109,"sku":"CDN-0988","price":35.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/35mm-trs-audio-jack-stereo-socket-for-audio-electronics-projects-8446353.png?v=1790779329"},{"product_id":"max98357a-i2s-3w-class-d-audio-amplifier-module","title":"MAX98357A I2S 3W Class-D Audio Amplifier Module","description":"\u003cp\u003eThe \u003cstrong\u003eMAX98357A\u003c\/strong\u003e is a mono 3W Class-D amplifier that takes \u003cstrong\u003eI2S digital audio directly\u003c\/strong\u003e — no separate DAC needed. It is the standard way to get sound out of an ESP32, ESP32-S3 or Raspberry Pi when the audio path is already digital.\u003c\/p\u003e\n\u003ch3\u003eWhy I2S rather than an analog amplifier\u003c\/h3\u003e\n\u003cp\u003eAn analog amplifier (such as a PAM8403) needs the microcontroller to produce an analog signal first, via its DAC or a PWM pin. The MAX98357A accepts the digital I2S stream straight from the controller, so the signal stays digital end to end — cleaner, and simpler to wire.\u003c\/p\u003e\n\u003ch3\u003eConnections\u003c\/h3\u003e\n\u003cp\u003eSeven pins: \u003cstrong\u003eLRC\u003c\/strong\u003e (word select), \u003cstrong\u003eBCLK\u003c\/strong\u003e (bit clock) and \u003cstrong\u003eDIN\u003c\/strong\u003e (data) are the three I2S lines, plus \u003cstrong\u003eVIN\u003c\/strong\u003e and \u003cstrong\u003eGND\u003c\/strong\u003e for power. \u003cstrong\u003eNo external MCLK is required.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTwo more are optional and can be left unconnected: \u003cstrong\u003eGAIN\u003c\/strong\u003e sets the output level (9dB by default), and \u003cstrong\u003eSD\u003c\/strong\u003e shuts the amplifier down or selects left\/right\/mono channel.\u003c\/p\u003e\n\u003cp\u003eThe speaker connects to the green two-pole screw terminal.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOutput: 3W mono into 4Ω (Class-D)\u003c\/li\u003e\n\u003cli\u003eInterface: I2S digital audio input\u003c\/li\u003e\n\u003cli\u003eSupply: 2.5V – 5.5V\u003c\/li\u003e\n\u003cli\u003ePairs with: ESP32 \/ ESP32-S3 \/ ESP32-C3 \/ Raspberry Pi\u003c\/li\u003e\n\u003cli\u003eTypical use: voice assistants, intercoms, sound playback, AI audio projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eCommonly paired with an INMP441 I2S MEMS microphone for a full digital audio in\/out path.\u003c\/em\u003e\u003c\/p\u003e","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53885278388589,"sku":"CDN-MAX98357A","price":707.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/max98357a-i2s-3w-class-d-audio-amplifier-module-1008859.png?v=1790773747"}],"url":"https:\/\/compoden.com\/collections\/audio-modules.oembed","provider":"Compoden","version":"1.0","type":"link"}