TECNOIOT 5pcs MPR121 Breakout V12 Capacitive Touch Sensor

【MPR121】 MPR121 Breakout V12 Capacitive Touch Sensor Controller Module I2C Keyboard Module

【Design compact】 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, they may be used to drive LEDs. There are four jumpers on the bottom of the board, all of which are set (closed) by default.

【High performance】 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 cont SDA, SCL and the switch pin to 10k pull-up resistors. If you do not require the pull-up resistors you can open the jumpers by cutting the trace conting them.

【COMPATABILITY】 There is no regulation on the board, so the voltage supplied should be between 2.5 and 3.6VDC. The VREG pin is conted through to 0.1uF capacitor to ground, which means, unless you modify the board, you can not operate the MPR121 in low-supply voltage mode (1.71-2.75VDC).

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