{"product_id":"ky031-knock-tap-sensor-module-compoden","title":"Ky031 Knock Tap Sensor Module | Compoden","description":"\u003ch1\u003eKy031 Knock Tap Sensor Module\u003c\/h1\u003e\n\u003cp\u003eThe Ky031 is a spring-based vibration sensor module that outputs a digital signal when a knock or tap is detected. Ideal for interactive projects, alarms, and percussive input. Its adjustable sensitivity lets you fine-tune the response to light taps or harder knocks.\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 to 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eDigital (Low on knock)\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\u003eDetection Method\u003c\/td\u003e\n\u003ctd\u003eSpring vibration\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eIndicator LED\u003c\/td\u003e\n\u003ctd\u003eLights on detection\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eDimensions (approx)\u003c\/td\u003e\n\u003ctd\u003e30 mm × 15 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-knock-pattern-door-lock\"\u003eKnock-activated door lock system\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/arduino-electronic-drum-kit-build-and-code-your-own-beat-pad\"\u003eDIY electronic drum pad\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003eTap-controlled light switch\u003c\/li\u003e\n  \u003cli\u003eVibration alarm for sensitive equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThe module works with any microcontroller that reads digital signals, including Arduino Uno, Nano, Mega, ESP32, ESP8266, and Raspberry Pi (with voltage level shifting if needed). It runs on 3.3V–5V logic, making it safe for both 5V and 3.3V boards.\u003c\/p\u003e\n\n\u003ch2\u003eWiring Notes\u003c\/h2\u003e\n\u003cp\u003eConnect VCC to 5V (or 3.3V), GND to GND, and DO (digital output) to any GPIO pin. The sensor pulls DO low when a knock is detected. No external pull-up resistor is required; the module includes one. Keep the sensor firmly attached to the surface you want to monitor.\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 Ky031 works directly with Arduino Uno. Connect DO to any digital input pin, read the state, and detect LOW pulses when a knock occurs. Example sketches are widely available.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I adjust the sensitivity?\u003c\/summary\u003e\u003cp\u003eYes, the onboard trimmer potentiometer lets you set how hard the knock must be to trigger the output. Turn clockwise to increase sensitivity (detect softer taps).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is the detection range?\u003c\/summary\u003e\u003cp\u003eThe spring sensor primarily detects direct mechanical vibrations transmitted through solid objects. It works best when firmly attached to a surface. Airborne vibrations, like sound, will not reliably trigger it.\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":53445127438701,"sku":"CDN-0709","price":35.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_d958077f-6a73-40a4-8e91-5387a4a98d6b.jpg?v=1781513451","url":"https:\/\/compoden.com\/products\/ky031-knock-tap-sensor-module-compoden","provider":"Compoden","version":"1.0","type":"link"}