{"title":"Displays","description":"\u003cp\u003eGive your project a face. Browse display modules — \u003cstrong\u003eOLED, character and graphic LCD, colour TFT, e-ink, and LED matrices\u003c\/strong\u003e — for showing readings, menus, graphics, and animations.\u003c\/p\u003e\u003cp\u003eAll compatible with Arduino, ESP32, and Raspberry Pi over I2C, SPI, or parallel, genuine and tested, in stock with fast shipping across India, Cash on Delivery, and a GST invoice.\u003c\/p\u003e","products":[{"product_id":"elecrow-rc050-5-inch-capacitive-touch-lcd-display-for-pi-pc-ps4","title":"Elecrow RC050 5-inch Capacitive Touch LCD Display for Pi PC PS4","description":"\u003ch1\u003eElecrow RC050 5-Inch Capacitive Touch LCD Display (800×480 HDMI\/USB)\u003c\/h1\u003e\u003cp\u003eThe Elecrow RC050 is a 5-inch IPS capacitive touch display with 800×480 resolution. It connects via HDMI for video and USB for touch and power, making it plug-and-play with Raspberry Pi, Windows, Mac, and even PS4. Ideal for building portable touchscreen projects, secondary monitors, or interactive kiosks.\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\u003eScreen Size\u003c\/td\u003e\n\u003ctd\u003e5 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e800×480 pixels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTouch Type\u003c\/td\u003e\n\u003ctd\u003eCapacitive multi-touch (up to 5 points)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eHDMI (video), USB (touch\/power)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eViewing Angle\u003c\/td\u003e\n\u003ctd\u003eIPS, 178° wide viewing angle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e5V DC via USB, 1A (2A recommended for full brightness)\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 Raspberry Pi gaming console with touch controls\u003c\/li\u003e\n\u003cli\u003eRetro gaming station using PS4 as the core system\u003c\/li\u003e\n\u003cli\u003eDesktop system monitor or information panel for PC stats\u003c\/li\u003e\n\u003cli\u003eIn-car dashboard touchscreen for navigation and media\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis display works with any device that has an HDMI output and a USB port. It is fully compatible with all Raspberry Pi models (including Pi 4 and Pi 5) running Raspberry Pi OS, where touch drivers are pre-installed. It also works with Windows, Mac, and Linux computers without additional drivers. For PS4, HDMI video is supported, but touch input is not functional due to lack of driver support.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect the included HDMI cable for video and the USB cable for both power and touch input. For Raspberry Pi, you can power the display from the Pi's USB port, but ensure your Pi's power supply provides ample current (at least 2.5A) to avoid instability. If using an external USB power source, a standard 5V\/1A adapter works; a 2A adapter is recommended for maximum brightness. No GPIO connections 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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with Raspberry Pi 4?\u003c\/summary\u003e\u003cp\u003eYes, the Elecrow RC050 works with Raspberry Pi 4 and all other 40-pin GPIO Pi models. Simply connect the HDMI and USB cables; touch drivers are included in the latest Raspberry Pi OS.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes the touch function work with PS4?\u003c\/summary\u003e\u003cp\u003eThe display works as a monitor for PS4 via HDMI, but the capacitive touch input is not supported on PS4 as it lacks touch drivers. You'll need to control via gamepad.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat power supply do I need?\u003c\/summary\u003e\u003cp\u003eThe display can be powered via the included USB cable from any 5V 1A USB port. For higher brightness, a 2A supply is recommended. It also works when powered from the Raspberry Pi’s USB ports, but ensure your Pi’s power source is adequate.\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":53444948984173,"sku":"CDN-0117","price":4600.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_e92ed4f8-ce85-443d-b2ea-3d5f13680909.jpg?v=1781512195"},{"product_id":"ph-sensor-module-with-ph-probe-water-quality-monitoring-sensor-0222","title":"PH Sensor Module with PH Probe - Water Quality Monitoring Sensor","description":"\u003ch1\u003ePH Sensor Module with PH Probe - Water Quality Monitoring Sensor\u003c\/h1\u003e\n\n\u003cp\u003eThe PH Sensor Module with BNC probe measures hydrogen ion concentration in liquids, outputting an analog voltage proportional to pH value. It's designed for continuous monitoring in hydroponics, aquariums, pools, and laboratory experiments. With simple calibration and wide compatibility, it provides reliable pH readings from 0 to 14.\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\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e0 - 14 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e0 - 5V (analog)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProbe Type\u003c\/td\u003e\n\u003ctd\u003eGlass electrode, BNC connector\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResponse Time\u003c\/td\u003e\n\u003ctd\u003e≤ 1 minute\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e0°C - 60°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\u003eHydroponics nutrient solution pH controller\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/aquarium-water-quality-monitor-kit-with-arduino-tds-and-temp\"\u003eAquarium water quality monitor and alert system\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSwimming pool pH level automatic adjuster\u003c\/li\u003e\n  \u003cli\u003eSoil pH testing rig for agricultural projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with any microcontroller or single-board computer that reads 0-5V analog signals, such as Arduino Uno, Mega, ESP32, or Raspberry Pi via an ADC. The module amplifies the mV-level probe signal to a 0-5V range, so no extra interfacing is needed. Use with a 5V supply and connect the analog output to an analog input pin.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V, GND to common ground, and the analog output to an ADC pin (e.g., A0 on Arduino). For best stability, use a dedicated 5V supply and avoid long unshielded wires. If readings drift, check the probe connection and recalibrate.\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 3-5 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 module outputs 0-5V analog, which can be read by any Arduino board using an analog input pin like A0. Just supply 5V and ground.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I calibrate the pH sensor?\u003c\/summary\u003e\u003cp\u003eUse buffer solutions of known pH (typically 4.0 and 7.0). Immerse the probe, adjust the onboard potentiometer until the output voltage matches the expected value for that pH, then repeat for the second point to set the slope.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the probe need special storage?\u003c\/summary\u003e\u003cp\u003eThe glass electrode should be kept wet in storage solution or pH 4 buffer when not in use. Never store it in distilled water as that leaches ions from the glass bulb.\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":53444953637229,"sku":"CDN-0222","price":1580.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_34332bec-4114-4372-9f79-3ae9149bb6b1.jpg?v=1781512312"},{"product_id":"winsen-mh-z19e-ndir-co2-sensor-air-quality-monitor","title":"Winsen MH-Z19E NDIR CO2 Sensor Air Quality Monitor","description":"\u003ch1\u003eWinsen MH-Z19E NDIR CO2 Sensor for Air Quality Monitoring\u003c\/h1\u003e\n\n\u003cp\u003eThe Winsen MH-Z19E is a non-dispersive infrared (NDIR) CO2 sensor offering accurate carbon dioxide concentration measurements in a compact, low-power package. It provides both UART serial and PWM output, making it ideal for air quality monitors, HVAC systems, and IoT environmental sensing. With a measurement range of 0–5000 ppm and built-in temperature compensation, it delivers reliable readings for indoor and outdoor applications.\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\u003eDetection Method\u003c\/td\u003e\n\u003ctd\u003eNDIR (Non-Dispersive Infrared)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e0–5000 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±(50 ppm + 5% of reading)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003eUART (TTL 3.3V), PWM\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e4.5–5.5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eWarm-up Time\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;3 minutes\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\/arduino-co2-monitor-kit-mh-z19-sensor-oled-and-ventilation-alert\"\u003eDesktop CO2 monitor with OLED display\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-esp32-wifi-relay-controller\"\u003eSmart ventilation controller using relay and WiFi\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-classroom-air-quality-monitor-kit\"\u003eClassroom air quality logger with SD card\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-air-quality-index-dashboard\"\u003eIoT indoor air quality dashboard with MQTT\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe MH-Z19E operates on 5V logic but includes a 3.3V regulator, allowing direct connection to 5V and 3.3V microcontrollers like Arduino Uno, ESP32, and Raspberry Pi. It uses a standard 4-pin header (VCC, GND, TX, RX) and communicates via UART at 9600 baud, making it easy to integrate with popular development boards.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V, GND to ground, and TX\/RX to the microcontroller's RX\/TX respectively. For PWM mode, use the PWM pin. Ensure a stable power supply; spikes may affect accuracy. The sensor requires a few minutes of warm-up for optimal readings.\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 3-5 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 sensor's TX to Arduino pin 2 (SoftwareSerial RX) and RX to pin 3 (TX), or use hardware serial (RX to RX, TX to TX with voltage level shifting if needed).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the lifespan of the NDIR sensor?\u003c\/summary\u003e\u003cp\u003eThe MH-Z19E has a long operational life of over 5 years under normal indoor conditions, as NDIR sensors have no consumable parts.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it require calibration?\u003c\/summary\u003e\u003cp\u003eThe sensor comes pre-calibrated, but for high-accuracy applications, manual calibration using fresh air (400 ppm) is recommended periodically.\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":53444983685485,"sku":"CDN-0566","price":1810.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_0ef892bb-ef60-40ac-85f7-3934583f237d.jpg?v=1781512675"},{"product_id":"sct103-non-invasive-ac-current-clamp-sensor-30a-for-monitoring","title":"SCT103 Non-invasive AC Current Clamp Sensor 30A for Monitoring","description":"\u003ch1\u003eSCT103 Non-invasive AC Current Sensor Clamp 30A\u003c\/h1\u003e\n\n\u003cp\u003eThe SCT103 is a non-invasive clamp current sensor designed to measure AC current up to 30A without breaking the circuit. Simply clip it around a live wire to get an isolated voltage output proportional to the current. Ideal for energy monitoring, power logging, and overcurrent protection 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\u003eCurrent Range\u003c\/td\u003e\n\u003ctd\u003e0 to 30A AC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003e0 to 1V (at 30A)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eFrequency Range\u003c\/td\u003e\n\u003ctd\u003e50Hz to 1kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eClamp Opening\u003c\/td\u003e\n\u003ctd\u003e13mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDielectric Strength\u003c\/td\u003e\n\u003ctd\u003e6000V AC for 1 minute\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCable Length\u003c\/td\u003e\n\u003ctd\u003e1.5 meters with 3.5mm jack\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\/smart-energy-monitor-kit-build-a-classroom-power-logger-with-arduino\"\u003eHome energy monitor using Arduino or ESP32\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSolar inverter output tracking\u003c\/li\u003e\n  \u003cli\u003eServer room PDU current logger\u003c\/li\u003e\n  \u003cli\u003eOvercurrent alarm system for appliances\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks with any microcontroller with an analog-to-digital converter (ADC), such as Arduino Uno, Nano, ESP8266, ESP32, Raspberry Pi (with ADC), STM32, and PIC. The output is 0–1V AC, offset to half the reference voltage via a simple voltage divider for most ADCs. No external burden resistor needed for standard operation.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the sensor's output pin to an analog input. Add a 10kΩ resistor from the signal to ground and a 0.1µF capacitor in parallel for noise reduction. For 3.3V boards, use a voltage divider to scale the output accordingly. Always ensure the measured wire is disconnected from power when clamping for safety.\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 3-5 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 SCT103 works with any Arduino that has an analog pin. Connect VCC to 5V, GND to GND, and output to A0. Use the analogRead() function to measure voltage and convert to current using a calibration factor.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I calibrate the sensor?\u003c\/summary\u003e\u003cp\u003eCalibration involves applying a known load and adjusting the conversion factor in software. Multiply the ADC reading by the reference voltage, then by a scaling constant (approximately 30 for 30A range) to get amperes. Fine-tune with a multimeter for accuracy.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it measure DC current?\u003c\/summary\u003e\u003cp\u003eNo, the SCT103 is a current transformer and only works with alternating current (AC). For DC measurements, consider a hall-effect sensor like ACS712.\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":53444998463853,"sku":"CDN-0613","price":360.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_a7608bf0-f30c-4ca2-9aac-06095b6d1bc8.jpg?v=1781512726"},{"product_id":"i2c-backpack-pcf8574-i2c-adapter-for-lcd-displays","title":"I2C Backpack – PCF8574 I2C Adapter for LCD Displays","description":"\u003ch1\u003eI2C Backpack – PCF8574 I2C Interface for Character LCDs\u003c\/h1\u003e\u003cp\u003eThe I2C Backpack is a compact module that adds I2C communication to standard character LCDs using the PCF8574 I\/O expander. It reduces the numerous parallel connections to just two data lines, simplifying wiring for Arduino, Raspberry Pi, and other microcontrollers. Ideal for projects needing a display with minimal pin usage.\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\u003eI2C Address\u003c\/td\u003e\n\u003ctd\u003e0x27 (configurable 0x20-0x27)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChip\u003c\/td\u003e\n\u003ctd\u003ePCF8574T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e2.5-6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003e16x2, 20x4 character LCDs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eI2C, 2-wire (SDA, SCL)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e41.5 x 19.5 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\u003e\u003ca href=\"\/products\/pi-pico-temperature-display-kit-with-oled-beginner-stem-learning\"\u003eDigital clock with temperature display\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eSystem status monitor for IoT devices\u003c\/li\u003e\n\u003cli\u003eMenu-driven interface for robotics projects\u003c\/li\u003e\n\u003cli\u003ePortable data logger with screen output\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eWorks with any 5V or 3.3V microcontroller that supports I2C, including Arduino Uno, Nano, Mega, Raspberry Pi, ESP8266, and ESP32. Simply solder the backpack to the LCD's 16-pin header, connect VCC, GND, SDA, and SCL.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eFor Arduino Uno, connect SDA to A4 and SCL to A5. On newer boards with dedicated I2C pins, use those. Ensure pull-up resistors (typically 4.7kΩ) are present on SDA and SCL lines if not built-in. The backpack operates at 5V but is tolerant of 3.3V I2C signals.\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 3-5 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, the I2C Backpack works directly with Arduino Uno. Use the LiquidCrystal_I2C library for simple integration.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I adjust the I2C address?\u003c\/summary\u003e\u003cp\u003eThe default address is 0x27 but can be changed by bridging solder pads (A0, A1, A2) to set addresses 0x20-0x27.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWill it work with a 20x4 LCD?\u003c\/summary\u003e\u003cp\u003eAbsolutely. The backpack supports all character LCDs using the HD44780 controller, including 20x4 and 16x2 variants.\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":53445042110829,"sku":"CDN-0848","price":85.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_63dda357-8fc1-4788-b0c4-4126e25ba5d3.jpg?v=1781513032"},{"product_id":"16x2-lcd-display-module-16x2-character-blue-backlight","title":"16x2 LCD Display Module - 16x2 Character Blue Backlight","description":"\u003ch1\u003e16x2 Character LCD Display Module with Blue Backlight\u003c\/h1\u003e\u003cp\u003eThe 16x2 LCD is a widely used character display capable of showing 16 characters across 2 lines. It is suitable for embedded projects, providing a simple way to display text, numbers, or custom characters. The module uses the HD44780 controller, ensuring compatibility with many development platforms.\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\u003eDisplay Format\u003c\/td\u003e\n\u003ctd\u003e16 characters x 2 lines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eController\u003c\/td\u003e\n\u003ctd\u003eHD44780 or compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBacklight Color\u003c\/td\u003e\n\u003ctd\u003eBlue with white characters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003e4-bit or 8-bit parallel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e80mm x 36mm x 12mm\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\/kit-arduino-digital-thermometer-kit\"\u003eArduino-based digital thermometer displaying temperature and humidity\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eReal-time clock showing time and date\u003c\/li\u003e\n\u003cli\u003eSimple text-based message display for IoT alerts\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-voltage-and-current-monitor\"\u003eSensor data monitor for voltage, current, or distance readings\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis module works with any 5V microcontroller that has at least 6 GPIO pins, such as Arduino Uno, Mega, or Nano. For 3.3V systems like Raspberry Pi or ESP8266, use a level shifter or enable 3.3V-compatible mode if supported by the module variant. It pairs well with common sensors and I2C adapters to save pins.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eFor a standard Arduino setup, connect VSS to GND, VDD to 5V, V0 to the middle pin of a 10K potentiometer (with ends to 5V and GND), RS to digital pin 12, EN to pin 11, D4-D7 to pins 5-4-3-2. Tie R\/W to GND. In code, use the LiquidCrystal library with 4-bit mode.\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 3-5 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, the 16x2 LCD works directly with Arduino Uno using 5V logic and the standard LiquidCrystal library. Connect as per the wiring notes above.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes it need a potentiometer for contrast?\u003c\/summary\u003e\u003cp\u003eA 10K potentiometer is recommended to adjust the contrast voltage on pin V0. Without it, the display may show blank or dark boxes.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I use this with 3.3V microcontrollers?\u003c\/summary\u003e\u003cp\u003eThis module is designed for 5V operation. To use with 3.3V boards like ESP32 or Raspberry Pi, you may need a level shifter for data lines or select a 3.3V-compatible variant.\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":53445043421549,"sku":"CDN-0847","price":150.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_e7e64a2b-e2a0-41e6-93a5-66176b763ed6.jpg?v=1781513037"},{"product_id":"bbc-microbit-v2-compact-arm-board-with-led-matrix-mic-sensors","title":"BBC Micro:bit v2 – Compact ARM Board with LED Matrix, Mic \u0026 Sensors","description":"\u003ch1\u003eBBC Micro:bit v2 – Compact ARM Cortex-M4 Board with LED Matrix, Mic \u0026amp; Sensors\u003c\/h1\u003e\n\n\u003cp\u003eThe BBC Micro:bit v2 is a pocket-sized microcontroller board designed for education and prototyping. It features a 32-bit ARM Cortex-M4 processor, an onboard microphone and speaker, and a 5x5 LED matrix for visual output. With built-in sensors and wireless connectivity, it's ideal for teaching coding, building wearables, and experimenting with IoT.\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\u003eProcessor\u003c\/td\u003e\n\u003ctd\u003eARM Cortex-M4 at 64 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMemory\u003c\/td\u003e\n\u003ctd\u003e256 KB Flash, 64 KB RAM\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003e5x5 LED matrix (25 red LEDs)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSensors\u003c\/td\u003e\n\u003ctd\u003eAccelerometer, magnetometer, light sensor, temperature sensor, touch logo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAudio\u003c\/td\u003e\n\u003ctd\u003eOnboard microphone, speaker, and MEMS mic\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnectivity\u003c\/td\u003e\n\u003ctd\u003eBluetooth 5.1, 2.4 GHz radio, microUSB, edge connector\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\u003eWearable step counter using the accelerometer and LED display\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-bluetooth-controlled-car\"\u003eBluetooth-controlled robot car with motor drivers\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eVoice-reactive light show using the microphone and LED matrix\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-sensor-environmental-data-logger-kit-for-arduino-mega\"\u003eEnvironmental data logger that records temperature and light, then transmits readings via radio\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis board works with any platform that supports micro:bit, including MakeCode (block-based and JavaScript) and MicroPython. It can interface with 3.3V-compatible sensors, motors, and modules via the edge connector. The micro:bit v2 is compatible with all standard micro:bit accessories and add-on boards such as the Kitronik Inventor's Kit.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003ePower the board via the microUSB port (5V) or a 3V battery pack. Use the edge connector's 3V and GND pins for external components. The pins operate at 3.3V logic; do not exceed 3.3V on I\/O lines. For analog input, use pins 0, 1, or 2 with a reference of 3.3V.\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 3-5 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\u003eThe micro:bit v2 is not directly compatible with Arduino; it uses a different architecture and programming environment. However, you can use micro:bit with Arduino IDE via third-party libraries, but it's not officially supported.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I power it with a 5V supply?\u003c\/summary\u003e\u003cp\u003eThe board is designed to be powered via microUSB (5V) or a 3V battery pack. Applying 5V directly to the edge connector 3V pin can damage the board. Use the onboard regulator for 5V USB input only.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes it include a battery?\u003c\/summary\u003e\u003cp\u003eNo, the micro:bit v2 does not come with a battery. It requires a separate battery pack (3V or 2xAAA) or can be powered via USB.\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":53445068718445,"sku":"CDN-0899","price":1770.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_cd2e452d-5747-4282-8a35-6fe99f58f640.jpg?v=1781513135"},{"product_id":"pzem-004t-ac-energy-monitor-module-100a-modbus-rtu","title":"PZEM-004T AC Energy Monitor Module 100A MODBUS-RTU","description":"\u003ch1\u003ePZEM-004T AC Energy Monitoring Module – 100A Current, MODBUS-RTU\u003c\/h1\u003e\n\u003cp\u003eThe PZEM-004T is a compact AC energy monitoring module designed for real-time measurement of electrical parameters in single-phase systems. It captures voltage, current, active power, frequency, power factor, and cumulative energy consumption with high accuracy. Engineers and makers use it to build IoT energy loggers, smart plugs, and home automation dashboards that require precise power analytics.\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\u003eVoltage Range\u003c\/td\u003e\n\u003ctd\u003e80 – 260 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCurrent Range\u003c\/td\u003e\n\u003ctd\u003e0 – 100 A (via external CT)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMeasurement Parameters\u003c\/td\u003e\n\u003ctd\u003eVoltage, current, active power, frequency, power factor, energy (kWh)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCommunication Interface\u003c\/td\u003e\n\u003ctd\u003eTTL MODBUS-RTU (9600 bps default)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAccuracy Class\u003c\/td\u003e\n\u003ctd\u003e1.0\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOperating Frequency\u003c\/td\u003e\n\u003ctd\u003e45 – 65 Hz\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\/esp32-energy-monitor-dashboard-kit-iot-power-meter-with-live-web-charts\"\u003eReal-time home energy monitor with Wi-Fi logging to a cloud dashboard using ESP32\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eSmart plug that tracks appliance power consumption and sends alerts when usage exceeds limits\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/kit-voltage-and-current-monitor\"\u003eSolar inverter output monitor to measure voltage, current, and power factor on the AC side\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eIndustrial energy audit tool with data export to CSV for spreadsheet analysis\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis module uses TTL-level MODBUS-RTU (5V logic) and interfaces directly with Arduino Uno, Mega, Nano, as well as ESP8266, ESP32, and Raspberry Pi (with a USB-to-TTL converter). It requires a stable 5V DC supply for the logic and separate AC connections through the included split-core current transformer. Works seamlessly with libraries like PZEM004Tv30 for Arduino.\u003c\/p\u003e\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V, GND to common ground, and TX\/RX to microcontroller serial pins (cross-connect). If using 3.3V boards like ESP8266, add a level shifter or voltage divider on the TX line to avoid damage. The CT clamp should be snapped around the live wire only – never around neutral or both wires.\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 3-5 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. Connect the module's 5V, GND, TX, and RX to the Arduino's 5V, GND, RX, and TX pins respectively. Use SoftwareSerial library for communication, as the module uses MODBUS-RTU at 9600 bps.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan it measure DC voltage or current?\u003c\/summary\u003e\u003cp\u003eNo. The PZEM-004T is designed exclusively for AC circuits (single-phase, 50\/60 Hz). It cannot measure DC parameters; use a dedicated DC sensor for those applications.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I read data with ESP32?\u003c\/summary\u003e\u003cp\u003eSince ESP32 operates at 3.3V, you must level-shift the PZEM's 5V TX line to 3.3V (a simple voltage divider with 1kΩ and 2kΩ resistors works). Use the PZEM004Tv30 library with HardwareSerial on pins 16 (RX) and 17 (TX).\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":53445077369197,"sku":"CDN-0923","price":1180.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_1a9180c6-4f9a-41c4-9662-88d1cfbfd40f.jpg?v=1781513169"},{"product_id":"ws2812b-5050-rgb-led-ring-light-241-leds-9-rings-matrix","title":"WS2812B 5050 RGB LED Ring Light 241 LEDs 9 Rings Matrix","description":"\u003ch1\u003eWS2812B 5050 RGB LED Ring Light 241 LEDs 9 Rings Matrix\u003c\/h1\u003e\n\u003cp\u003eThis WS2812B LED ring light features 241 individually addressable 5050 RGB LEDs arranged in 9 concentric rings on a black PCB. Each LED can be controlled with just one data line, making it ideal for circular lighting, wearables, signage, and interactive art projects. The ring runs on 5V DC and provides high brightness with full 24-bit color control.\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\u003eLED Type\u003c\/td\u003e\n\u003ctd\u003eWS2812B 5050 RGB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTotal LEDs\u003c\/td\u003e\n\u003ctd\u003e241\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eArrangement\u003c\/td\u003e\n\u003ctd\u003e9 concentric rings\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eData Protocol\u003c\/td\u003e\n\u003ctd\u003eSingle-wire (NZR)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e~130mm\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\u003eCircular RGB clock with animated effects\u003c\/li\u003e\n  \u003cli\u003eWearable LED badge or costume lighting\u003c\/li\u003e\n  \u003cli\u003eAmbient light ring for photography\u003c\/li\u003e\n  \u003cli\u003eInteractive wall art with motion-reactive patterns\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eWorks directly with Arduino, ESP32, Raspberry Pi Pico, and other 5V microcontrollers. Compatible with FastLED and Adafruit NeoPixel libraries. Use a 5V, 2A+ power supply for full brightness. Connect DI pin to any digital output, and link DO to the next ring’s DI for daisy-chaining.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V, GND to common ground, and DIN to your controller’s data pin. A 330Ω resistor in series with the data line and a 1000µF capacitor across power input are recommended to protect the first LED. Avoid powering through the microcontroller; use external 5V supply with 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 3-5 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 WS2812B ring works with Arduino Uno using digital pin 6 with FastLED or NeoPixel libraries. Provide separate 5V power to the ring.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow many LEDs are on each ring?\u003c\/summary\u003e\u003cp\u003eThe 9 rings contain LEDs in the following order from innermost: 1, 8, 12, 16, 24, 32, 40, 48, 60 — totalling 241 LEDs. Exact counts may vary slightly by manufacturing batch.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I cut the rings apart?\u003c\/summary\u003e\u003cp\u003eThe rings are on a single PCB, but you can cut between rings along the marked break lines to use them separately. Each ring has its own data in\/out pads.\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":53445086708077,"sku":"CDN-0089","price":3040.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_17aed078-253c-4fef-bf7f-6ba49e3cdb59.jpg?v=1781513246"},{"product_id":"elecrow-101-ips-1280x800-touch-display-with-acrylic-case-compoden","title":"Elecrow 10.1\" IPS 1280x800 Touch Display with Acrylic Case | Compoden","description":"\u003ch1\u003eElecrow 10.1 inch IPS 1280x800 Touchscreen Display Monitor with Acrylic Case\u003c\/h1\u003e\n\u003cp\u003eThe Elecrow 10.1-inch IPS touchscreen display provides a high-resolution 1280x800 visual interface for single-board computers and embedded systems. Its IPS panel delivers wide viewing angles and accurate colors, while the included acrylic case protects the electronics in desktop or portable builds. This monitor accepts HDMI and VGA inputs, with touch functionality over USB, making it a ready-to-use display module for Raspberry Pi, BeagleBone, and other HDMI-equipped devices.\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\u003eScreen Size\u003c\/td\u003e\n\u003ctd\u003e10.1 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e1280×800 (WXGA)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePanel Type\u003c\/td\u003e\n\u003ctd\u003eIPS LED-backlit\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTouch Interface\u003c\/td\u003e\n\u003ctd\u003eUSB capacitive, 5-point multi-touch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInput Ports\u003c\/td\u003e\n\u003ctd\u003eHDMI 1.4, VGA, USB for touch, micro USB for power\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAudio Output\u003c\/td\u003e\n\u003ctd\u003e3.5mm headphone jack\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\u003eRaspberry Pi-powered desktop monitor for coding and browsing\u003c\/li\u003e\n  \u003cli\u003ePortable retro gaming station with RetroPie\u003c\/li\u003e\n  \u003cli\u003eKitchen smart display for recipes and home automation\u003c\/li\u003e\n  \u003cli\u003eInformation kiosk for offices or exhibitions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eCompatible with Raspberry Pi 4, 3, and Zero (via mini HDMI adapter), BeagleBone Black, NVIDIA Jetson Nano, and any device with HDMI output. Works with Windows, Linux, and macOS for touch input after driver installation.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the HDMI cable from your board to the display, and the USB touch cable to a powered USB port. Power the monitor via the micro USB port (5V\/2A adapter recommended). Ensure the USB cable is plugged before booting for touch recognition.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Raspberry Pi?\u003c\/summary\u003e\u003cp\u003eYes, it works plug-and-play with Raspbian and most Linux distributions. Simply connect HDMI for video and USB for touch input.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the acrylic case come pre-assembled?\u003c\/summary\u003e\u003cp\u003eThe display arrives fully mounted inside the acrylic case with cutouts for all ports and mounting tabs, ready for immediate use.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use this monitor without touch with just VGA?\u003c\/summary\u003e\u003cp\u003eYes, the VGA input delivers video independently. Touch functionality requires the USB cable to be connected to a host device.\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":53445090902381,"sku":"CDN-0118","price":10030.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_043a896e-a346-4ac4-95f7-1f12b4def3ef.jpg?v=1781513262"},{"product_id":"ad8232-ecg-sensor-module-heart-rate-monitor-with-electrodes","title":"AD8232 ECG Sensor Module – Heart Rate Monitor with Electrodes","description":"\u003ch1\u003eAD8232 ECG Heart Rate Monitor Sensor Module with ECG Cables \u0026amp; Electrodes\u003c\/h1\u003e\n\u003cp\u003eThe AD8232 module captures the heart's electrical activity and outputs an analog ECG waveform. It is used for heart rate monitoring, fitness tracking, and bio-signal projects. Its integrated right-leg drive and lead-off detection deliver clean signals with minimal noise.\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\u003eAnalog (0V – VCC)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eGain\u003c\/td\u003e\n\u003ctd\u003e100 (fixed)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLeads-off Detection\u003c\/td\u003e\n\u003ctd\u003eYes (LO+ and LO− pins)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003e3.5 mm audio jack for electrode lead\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e35 mm × 30 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\/kit-resting-heart-rate-monitor\"\u003eArduino-based heart rate monitor with OLED display\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eECG waveform plotter using Python or Processing\u003c\/li\u003e\n  \u003cli\u003eWireless health tracker with ESP32 and BLE\u003c\/li\u003e\n  \u003cli\u003eBiofeedback stress-relief wearable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eFits any microcontroller with an analog input: Arduino Uno, Mega, Nano, ESP32, ESP8266, and Raspberry Pi (with external ADC). Accepts 3.3V or 5V power, with logic levels matching supply voltage. Pair with the standard 3-lead patient cable and disposable electrodes for best results.\u003c\/p\u003e\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect the module’s OUT pin to an analog input, and LO+ \/ LO− to digital pins for lead-off alerts. Use the 3‑electrode configuration: right arm (RA), left arm (LA), and left leg (LL). Keep signal leads short to reduce 50 Hz interference.\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 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this compatible with Arduino?\u003c\/summary\u003e\u003cp\u003eYes, works directly with any Arduino board that has an analog pin (Uno, Mega, Nano). Just connect OUT to A0, power to 5V or 3.3V, and read with analogRead().\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDo the electrodes come in the box?\u003c\/summary\u003e\u003cp\u003eYes, the kit includes a set of adhesive ECG electrodes and the 3.5 mm to snap-lead patient cable.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan this diagnose heart conditions?\u003c\/summary\u003e\u003cp\u003eNo, it is intended for educational, hobby, and fitness monitoring only. It does not provide medical-grade diagnosis.\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":53445102141805,"sku":"CDN-0304","price":970.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_c9b109f7-f17c-4def-ba41-6d7db2e7d524.jpg?v=1781513307"},{"product_id":"24-inch-tft-lcd-display-ili9341-spi-240x320-for-arduino-esp32","title":"2.4 Inch TFT LCD Display ILI9341 – SPI 240x320 for Arduino \u0026 ESP32","description":"\u003ch1\u003e2.4 Inch TFT LCD Display ILI9341 – SPI 240x320\u003c\/h1\u003e\n\u003cp class=\"product-lede\"\u003eThe 2.4-inch TFT LCD display with ILI9341 controller offers 240x320 pixel resolution and SPI interface, ideal for Arduino, ESP32, and Raspberry Pi projects that need vibrant color graphics and touch-free simplicity.\u003c\/p\u003e\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay Size\u003c\/th\u003e\n\u003ctd\u003e2.4 inch (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003e240 × 320 pixels (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eController\u003c\/th\u003e\n\u003ctd\u003eILI9341\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInterface\u003c\/th\u003e\n\u003ctd\u003e4-wire SPI (plus CS, DC, RST)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Voltage\u003c\/th\u003e\n\u003ctd\u003e3.3V (module supports 5V logic tolerance)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBacklight\u003c\/th\u003e\n\u003ctd\u003eWhite LED, adjustable via PWM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eActive Area\u003c\/th\u003e\n\u003ctd\u003e~36.72 × 48.96 mm (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eViewing Direction\u003c\/th\u003e\n\u003ctd\u003e6 o'clock (typical)\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\/arduino-digital-clock-kit-build-your-own-real-time-clock-with-ds3231-rtc\"\u003e\n\u003cstrong\u003eArduino Digital Clock:\u003c\/strong\u003e A simple colorful clock with date and weather icons on Arduino Uno using the DS3231 RTC module.\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-animated-weather-station-display\"\u003e\n\u003cstrong\u003eESP32 Weather Station:\u003c\/strong\u003e Fetch live weather data over Wi-Fi and display animated icons, temperature, and humidity graphs.\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRaspberry Pi Retro Game Console:\u003c\/strong\u003e Use fbcp-ili9341 driver to mirror the desktop and play classic emulators on the compact screen.\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-live-sensor-data-web-charts\"\u003e\n\u003cstrong\u003eCBSE Physics\/ATL Practical:\u003c\/strong\u003e Show real‑time sensor data (LDR, DHT11) as moving line charts for data logging experiments.\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/kit-esp32-home-energy-dashboard\"\u003e\n\u003cstrong\u003eSmart India Hackathon Dashboard:\u003c\/strong\u003e Build an IoT smart‑home control panel that shows appliance states, energy usage, and alerts.\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\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 level shifter or 5V-tolerant module\u003c\/td\u003e\n\u003ctd\u003eCS=D10, DC=D9, RST=D8, MOSI=D11, SCK=D13\u003c\/td\u003e\n\u003ctd\u003eAdafruit_ILI9341, TFT_eSPI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eArduino Nano\u003c\/td\u003e\n\u003ctd\u003eYes with level shifter or 5V-tolerant module\u003c\/td\u003e\n\u003ctd\u003eCS=D10, DC=D9, RST=D8, MOSI=D11, SCK=D13\u003c\/td\u003e\n\u003ctd\u003eAdafruit_ILI9341, TFT_eSPI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eArduino Mega 2560\u003c\/td\u003e\n\u003ctd\u003eYes with level shifter or 5V-tolerant module\u003c\/td\u003e\n\u003ctd\u003eCS=53, DC=49, RST=48, MOSI=51, SCK=52\u003c\/td\u003e\n\u003ctd\u003eAdafruit_ILI9341, TFT_eSPI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eESP8266 NodeMCU\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eCS=D8, DC=D2, RST=D1, MOSI=D7, SCK=D5\u003c\/td\u003e\n\u003ctd\u003eTFT_eSPI (custom User_Setup.h)\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\u003eCS=5, DC=17, RST=16, MOSI=23, SCK=18 (VSPI)\u003c\/td\u003e\n\u003ctd\u003eTFT_eSPI, Adafruit_ILI9341\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\u003eCS=GP17, DC=GP20, RST=GP21, MOSI=GP19, SCK=GP18 (SPI0)\u003c\/td\u003e\n\u003ctd\u003eTFT_eSPI (Pico SDK), CircuitPython ILI9341\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\u003eCS=CE0 (GPIO8), DC=GPIO24, RST=GPIO25, MOSI=GPIO10, SCK=GPIO11 (SPI0)\u003c\/td\u003e\n\u003ctd\u003ePython (spidev\/Adafruit Blinka), fbcp-ili9341\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWiring and Interface Notes\u003c\/h2\u003e\n\u003cp\u003eStandard 4-wire SPI requires only MOSI, SCK, CS, DC, and RST; MISO is optional for read operations. For 5 V boards like Arduino Uno, use a logic level shifter on signal lines unless your module documents 5 V tolerance—most modules include an onboard 3.3 V regulator and accept 5 V CMOS levels safely. Connect LED pin to a PWM-capable GPIO through a small resistor (or directly to 3.3 V for constant backlight) to control brightness in software.\u003c\/p\u003e\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 ILI9341 and ST7789 TFT displays?\u003c\/h3\u003e\n\u003cp\u003eThe ILI9341 supports 240×320 resolution with 262K colors, while many ST7789 modules are 240×240 (square) and may offer slightly faster refresh rates. Both work well with Arduino and ESP32 libraries like TFT_eSPI.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch3\u003eCan I use this display without connecting the MISO pin?\u003c\/h3\u003e\n\u003cp\u003eYes, most Arduino and ESP32 libraries default to write-only mode and do not require MISO. Simply leave the MISO pin unconnected; your code will function normally for all drawing operations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"Product\",\n      \"@id\": \"https:\/\/compoden.in\/products\/24-inch-tft-lcd-display-ili9341-spi-240x320-for-arduino-esp32#product\",\n      \"name\": \"2.4 Inch TFT LCD Display ILI9341 – SPI 240x320\",\n      \"description\": \"Buy 2.4 inch TFT LCD display ILI9341 with 240x320 SPI interface for Arduino, ESP32, Raspberry Pi. Bright color TFT ideal for maker projects. Best price India. 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