{"product_id":"mpr121-module-12-key-capacitive-touch-sensor-breakout-stemma-qt","title":"MPR121 module 12-Key Capacitive Touch Sensor Breakout STEMMA QT","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNONE\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eCondition\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNew\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHigh-concerned chemical\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003enone\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOrigin\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMainland China\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eType\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eModule\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003eDescription\u003c\/p\u003e\u003cp\u003eAdd lots of touch sensors to your next microcontroller project with this easy-to-use 12-channel capacitive touch sensor breakout board, starring the MPR121.  This chip can handle up to 12 individual touchpads.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe MPR121 has support for only I2C, which can be implemented with nearly any microcontroller.  You can select one of 4 addresses with the ADDR pin, for a total of 48 capacitive touch pads on one I2C 2-wire bus.  Using this chip is a lot easier than doing the capacitive sensing with analog inputs: it handles all the filtering for you and can be configured for more\/less sensitivity.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThis sensor comes as a tiny hard-to-solder chip so we put it onto a breakout board for you.  Since it's a 3V-only chip, we added a 3V regulator and I2C level shifting so it's safe to use with any 3V or 5V microcontroller\/processor like .  We even added an LED onto the IRQ line so it will blink when touches are detected, making debugging by sight a bit easier on you.  Comes with a fully assembled board, and a stick of 0.1\" header so you can plug it into a breadboard.  For contacts, we suggest using copper foil or pyralux, then solder a wire that connects from the foil pad to the breakout.\u003c\/p\u003e","brand":"Yoeruyo","offers":[{"title":"Default Title","offer_id":55449498681643,"sku":"\u003cnone\u003e","price":68.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1000\/5744\/8747\/files\/S4b26b8650f7f494489643060ca99f8f4W.webp?v=1788759919","url":"https:\/\/yoeruyo.com\/products\/mpr121-module-12-key-capacitive-touch-sensor-breakout-stemma-qt","provider":"Yoeruyo","version":"1.0","type":"link"}