IOT 제품 > 센서
12키 정전식 터치센서 브레이크아웃 보드(MPR121) ( Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121 )
 

Adafruit 12키 정전식 터치센서 브레이크아웃 보드(MPR121)


Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121

Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121

Adafruit 12-Key Capacitive Touch Sensor Breakout - MPR121
 



Description

 

Add 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.

The 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.

This 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.

Getting 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.

Of 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 gets the sensor logging data and detecting your touch!






Technical Details

 

MPR121 Datasheet

  • Dimensions: 33mm x 19mm x 2mm / 1.3" x .8" x .1"
  • Weight: 2.2g
  • Uses I2C 7-bit address 0x5A (can be set to 0x5B, 0x5C or 0x5D)


 

이전글
라즈베리파이 2 모델 B 1GB ( Raspberry pi 2 model B 1GB ) 2015/06/23
인텔 에디슨 用 로미오 ( Romeo for Edison Controller (With Intel® Edison) ) 2015/06/23
다음글
라즈베리파이 2 GPS 미니 보드 ( Adafruit Ultimate GPS HAT for Raspberry Pi A+/B+/Pi 2 - Mini Kit ) 2015/06/23
라즈베리 파이에 5MP 나이트 비전 카메라 ( 5MP Night Vision Camera for Raspberry Pi ) 2015/06/23