{"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 3-5 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, 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\/image_1_438dd0f4-7ace-4d89-b9f6-4d8ab7374ce1.jpg?v=1781512469","url":"https:\/\/compoden.com\/products\/piezoelectric-buzzer-26mm-sensor-transducer-compoden","provider":"Compoden","version":"1.0","type":"link"}