{"id":4331426545782,"title":"Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121","handle":"adafruit-12-key-capacitive-touch-sensor-breakout-mpr121","description":"\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 touch pads.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\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\u003cp\u003e\u003cbr\u003e\u003c\/p\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 its safe to use with any 3V or 5V microcontroller\/processor like Arduino. 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\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eGetting started is a breeze with our Arduino library and tutorial. You'll be up and running in a few minutes, and if you are using another microcontroller, its easy to port our code.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-mpr121-12-key-capacitive-touch-sensor-breakout-tutorial\" target=\"_blank\"\u003eOf course, we wouldn't leave you with a datasheet and a \"good luck!\" - we wrote a detailed tutorial showing how to wire up the sensor, use it with an Arduino and example code that g\u003c\/a\u003e\u003ca href=\"http:\/\/learn.adafruit.com\/adafruit-mpr121-12-key-capacitive-touch-sensor-breakout-tutorial\" target=\"_blank\"\u003eets the sensor logging data and detecting your touch!\u003c\/a\u003e\u003c\/p\u003e","published_at":"2019-11-04T13:12:26-05:00","created_at":"2019-11-01T12:52:26-04:00","vendor":"Adafruit","type":"Adafruit","tags":[],"price":790,"price_min":790,"price_max":790,"available":true,"price_varies":false,"compare_at_price":795,"compare_at_price_min":795,"compare_at_price_max":795,"compare_at_price_varies":false,"variants":[{"id":31075350773878,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"K342","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121","public_title":null,"options":["Default Title"],"price":790,"weight":0,"compare_at_price":795,"inventory_quantity":33,"inventory_management":"shopify","inventory_policy":"continue","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/1982-01.jpg?v=1572627146"],"featured_image":"\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/1982-01.jpg?v=1572627146","options":["Title"],"media":[{"alt":null,"id":5523173474422,"position":1,"preview_image":{"aspect_ratio":1.332,"height":728,"width":970,"src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/1982-01.jpg?v=1572627146"},"aspect_ratio":1.332,"height":728,"media_type":"image","src":"https:\/\/cdn.shopify.com\/s\/files\/1\/1749\/9663\/products\/1982-01.jpg?v=1572627146","width":970}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\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 touch pads.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\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\u003cp\u003e\u003cbr\u003e\u003c\/p\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 its safe to use with any 3V or 5V microcontroller\/processor like Arduino. 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\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003eGetting started is a breeze with our Arduino library and tutorial. You'll be up and running in a few minutes, and if you are using another microcontroller, its easy to port our code.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/learn.adafruit.com\/adafruit-mpr121-12-key-capacitive-touch-sensor-breakout-tutorial\" target=\"_blank\"\u003eOf course, we wouldn't leave you with a datasheet and a \"good luck!\" - we wrote a detailed tutorial showing how to wire up the sensor, use it with an Arduino and example code that g\u003c\/a\u003e\u003ca href=\"http:\/\/learn.adafruit.com\/adafruit-mpr121-12-key-capacitive-touch-sensor-breakout-tutorial\" target=\"_blank\"\u003eets the sensor logging data and detecting your touch!\u003c\/a\u003e\u003c\/p\u003e"}