{"product_id":"adafruit-industries-mpr121-12-key-capacitive-touch-sensor-gator-breakout-stemma-qtqwiic","title":"Adafruit Industries MPR121 12-Key Capacitive Touch Sensor Gator Breakout - Stemma QTQwiic","description":"\u003ch3\u003eAdafruit Industries MPR121 12-Key Capacitive Touch Sensor Gator Breakout - Stemma QTQwiic\u003c\/h3\u003e\r\n\u003cp id=\"b\"\u003eAdd lots of touch sensors to your next microcontroller project with this easy-\r\nto-use 12-channel capacitive touch sensor breakout board, starring the MPR121.\r\nThis chip can handle up to 12 individual touchpads with plug-and-play STEMMA\r\nQT connector and large alligator\/croc-clip friendly pads, its a no-solder\r\nsolution to capacitive touch sensing.The MPR121 has support for reading data\r\nover I2C, which can be implemented with nearly any microcontroller. You can\r\nselect one of 2 addresses with the ADDR pin (solder it close for the\r\nalternative address), for a total of 24 capacitive touch pads on one I2C\r\n2-wire bus. Using this chip is a lot easier than doing the capacitive sensing\r\nwith analog inputs: it handles all the filtering for you and can be configured\r\nfor more\/less sensitivity.This sensor comes as a tiny hard-to-solder chip so\r\nwe put it onto a breakout board for you. Since it's a 3V-only chip, we added a\r\n3V regulator and I2C level shifting so it's safe to use with any 3V or 5V\r\nmicrocontroller\/processor like Arduino. We even added an LED onto the IRQ line\r\nso it will blink when touches are detected, making debugging by sight a bit\r\neasier on you.To make using it as easy as possible, we’ve put the MPR121 on a\r\nbreakout PCB in our Stemma QT form factor with a sprinkle of support circuitry\r\nto give you options when testing. You can either use a breadboard or the\r\nSparkFun qwiic compatible STEMMA QT connectors, and compatibility with 5V\r\nvoltage levels as commonly found on Arduinos, as well as 3.3V logic used by\r\nmany other boards like the Raspberry Pi or our Feathers. QT Cable is not\r\nincluded, but we have a variety in the shop for quick plug-and-play\r\nsupport.Getting started is a breeze with our Arduino and CircuitPython\/Python\r\nlibraries and tutorials. Product Dimensions: 51.0mm x 25.2mm x 4.5mm \/ 2.0 x\r\n1.0 x 0.2\u003c\/p\u003e \r\n\r\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\r\n  \u003cul class=\"a\"\u003e\r\n  \u003c\/ul\u003e","brand":"Adafruit","offers":[{"title":"Default Title","offer_id":44154530005172,"sku":"B08XMY6KN9","price":122.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0595\/9906\/1172\/files\/B08XMY6KN9.jpg?v=1775786604","url":"https:\/\/auspowers.com\/products\/adafruit-industries-mpr121-12-key-capacitive-touch-sensor-gator-breakout-stemma-qtqwiic","provider":"AusPower Australia","version":"1.0","type":"link"}