{"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 3-5 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\/image_1_a4100478-736c-4711-8047-3be2f75e3d83.jpg?v=1781512489","url":"https:\/\/compoden.com\/products\/piezoelectric-buzzer-35mm-sound-sensor-transducer","provider":"Compoden","version":"1.0","type":"link"}