MPR121Breakout V12 커패시 티브 터치 센서 컨트롤러 모듈 I2C 인터페이스 Arduino W/ Driving Pin 용 키보드 개발 보드

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USD 0.98

MPR121Breakout V12 커패시 티브 터치 센서 컨트롤러 모듈 I2C 인터페이스 Arduino W/ Driving Pin 용 키보드 개발 보드

Description
Specification

Description

MPR121Breakout V12 Capacitive Touch Sensor Controller Module I2C Interface Keyboard Development Board for Arduino W/ Driving Pin Buy 2 orders to enjoy an extra 3% discount Description: This is a breakout board for Freescale's MPR121QR2. The MPR121 is a capacitive touch sensor controller driven by an I2C interface. The chip can control up to twelve individual electrodes, as well as a simulated thirteenth electrode. The MPR121 also features eight LED driving pins. When these pins are not configured as electrodes, they may be used to drive LEDs. There a four jumpers on the bottom of the board, all of which are set (closed) by default. An address jumper ties the ADD pin to ground, meaning the default I2C address of the chip will be 0x5A. If you need to change the address of the chip (by shorting ADD to a different pin), make sure you open the jumper first. Jumpers also connect SDA, SCL and the interrupt pin to 10k pull-up resistors. If you don't require the pull-up resistors you can open the jumpers by cutting the trace connecting them. There is no regulation on the board, so the voltage supplied should be between 2.5 and 3.6VDC. The VREG pin is connected through a 0.1uF capacitor to ground, which means, unless you modify the board, you can't operate the MPR121 in low-supply voltage mode (1.71-2.75VDC). Product Show: