{"id":8013214449844,"title":"Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121 [ADA1982]","handle":"adafruit-12-key-capacitive-touch-sensor-breakout-mpr121-ada1982","description":"\u003ch3\u003eAdafruit 12-Key Capacitive Touch Sensor Breakout - MPR121 [ADA1982]\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. The MPR121 has support for\r\nonly I2C, which can be implemented with nearly any microcontroller. You can\r\nselect one of 4 addresses with the ADDR pin, for a total of 48 capacitive\r\ntouch pads on one I2C 2-wire bus. Using this chip is a lot easier than doing\r\nthe capacitive sensing with analog inputs: it handles all the filtering for\r\nyou and can be configured for more\/less sensitivity. This sensor comes as a\r\ntiny hard-to-solder chip so we put it onto a breakout board for you. Since\r\nit's a 3V-only chip, we added a 3V regulator and I2C level shifting so it's\r\nsafe to use with any 3V or 5V microcontroller\/processor like Arduino. We even\r\nadded an LED onto the IRQ line so it will blink when touches are detected,\r\nmaking debugging by sight a bit easier on you. Comes with a fully assembled\r\nboard, and a stick of 0.1\" header so you can plug it into a breadboard. For\r\ncontacts, we suggest using copper foil or pyralux, then solder a wire that\r\nconnects from the foil pad to the breakout.\u003c\/p\u003e \r\n\r\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\r\n \u003cul class=\"a\"\u003e\r\n \u003cli\u003eUpdated in 2021 - Now featuring STEMMA QT connectors for quick connectivity\u003c\/li\u003e\r\n \u003cli\u003eEasy-to-use 12-channel capacitive touch sensor breakout board\u003c\/li\u003e\r\n \u003cli\u003eSupports only I2C, which can be implemented with nearly any microcontroller\u003c\/li\u003e\r\n \u003cli\u003eSelect 1 of 4 addresses with the ADDR pin, for a total of 48 capacitive touch pads on one I2C 2-wire bus\u003c\/li\u003e\r\n \u003cli\u003eHandles up to 12 individual touch pads\u003c\/li\u003e\r\n \u003c\/ul\u003e","published_at":"2025-12-07T19:47:21+11:00","created_at":"2025-12-07T19:47:18+11:00","vendor":"Adafruit","type":"Capacitive","tags":["industrial_selected_Nov2025"],"price":10500,"price_min":10500,"price_max":10500,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":44102869254324,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"B00SK8PVNA","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121 [ADA1982]","public_title":null,"options":["Default Title"],"price":10500,"weight":91,"compare_at_price":null,"inventory_management":"shopify","barcode":"701851953810","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/auspowers.com\/cdn\/shop\/files\/81OC2H0c1-L.jpg?v=1765097240","\/\/auspowers.com\/cdn\/shop\/files\/81W-Biu6OQL.jpg?v=1765097240","\/\/auspowers.com\/cdn\/shop\/files\/81xuzp2EFiL.jpg?v=1765097240","\/\/auspowers.com\/cdn\/shop\/files\/81CbLuxwpQL.jpg?v=1765097240"],"featured_image":"\/\/auspowers.com\/cdn\/shop\/files\/81OC2H0c1-L.jpg?v=1765097240","options":["Title"],"media":[{"alt":"[Australia - AusPower] - Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121 [ADA1982] ","id":32452867588276,"position":1,"preview_image":{"aspect_ratio":1.333,"height":900,"width":1200,"src":"\/\/auspowers.com\/cdn\/shop\/files\/81OC2H0c1-L.jpg?v=1765097240"},"aspect_ratio":1.333,"height":900,"media_type":"image","src":"\/\/auspowers.com\/cdn\/shop\/files\/81OC2H0c1-L.jpg?v=1765097240","width":1200},{"alt":"[Australia - AusPower] - Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121 [ADA1982] ","id":32452867621044,"position":2,"preview_image":{"aspect_ratio":1.333,"height":900,"width":1200,"src":"\/\/auspowers.com\/cdn\/shop\/files\/81W-Biu6OQL.jpg?v=1765097240"},"aspect_ratio":1.333,"height":900,"media_type":"image","src":"\/\/auspowers.com\/cdn\/shop\/files\/81W-Biu6OQL.jpg?v=1765097240","width":1200},{"alt":"[Australia - AusPower] - Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121 [ADA1982] ","id":32452867653812,"position":3,"preview_image":{"aspect_ratio":1.333,"height":900,"width":1200,"src":"\/\/auspowers.com\/cdn\/shop\/files\/81xuzp2EFiL.jpg?v=1765097240"},"aspect_ratio":1.333,"height":900,"media_type":"image","src":"\/\/auspowers.com\/cdn\/shop\/files\/81xuzp2EFiL.jpg?v=1765097240","width":1200},{"alt":"[Australia - AusPower] - Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121 [ADA1982] ","id":32452867686580,"position":4,"preview_image":{"aspect_ratio":1.333,"height":900,"width":1200,"src":"\/\/auspowers.com\/cdn\/shop\/files\/81CbLuxwpQL.jpg?v=1765097240"},"aspect_ratio":1.333,"height":900,"media_type":"image","src":"\/\/auspowers.com\/cdn\/shop\/files\/81CbLuxwpQL.jpg?v=1765097240","width":1200}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch3\u003eAdafruit 12-Key Capacitive Touch Sensor Breakout - MPR121 [ADA1982]\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. The MPR121 has support for\r\nonly I2C, which can be implemented with nearly any microcontroller. You can\r\nselect one of 4 addresses with the ADDR pin, for a total of 48 capacitive\r\ntouch pads on one I2C 2-wire bus. Using this chip is a lot easier than doing\r\nthe capacitive sensing with analog inputs: it handles all the filtering for\r\nyou and can be configured for more\/less sensitivity. This sensor comes as a\r\ntiny hard-to-solder chip so we put it onto a breakout board for you. Since\r\nit's a 3V-only chip, we added a 3V regulator and I2C level shifting so it's\r\nsafe to use with any 3V or 5V microcontroller\/processor like Arduino. We even\r\nadded an LED onto the IRQ line so it will blink when touches are detected,\r\nmaking debugging by sight a bit easier on you. Comes with a fully assembled\r\nboard, and a stick of 0.1\" header so you can plug it into a breadboard. For\r\ncontacts, we suggest using copper foil or pyralux, then solder a wire that\r\nconnects from the foil pad to the breakout.\u003c\/p\u003e \r\n\r\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\r\n \u003cul class=\"a\"\u003e\r\n \u003cli\u003eUpdated in 2021 - Now featuring STEMMA QT connectors for quick connectivity\u003c\/li\u003e\r\n \u003cli\u003eEasy-to-use 12-channel capacitive touch sensor breakout board\u003c\/li\u003e\r\n \u003cli\u003eSupports only I2C, which can be implemented with nearly any microcontroller\u003c\/li\u003e\r\n \u003cli\u003eSelect 1 of 4 addresses with the ADDR pin, for a total of 48 capacitive touch pads on one I2C 2-wire bus\u003c\/li\u003e\r\n \u003cli\u003eHandles up to 12 individual touch pads\u003c\/li\u003e\r\n \u003c\/ul\u003e"}