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MPR121 Breakout V12 Capacitive Touch Sensor Controller Module I2C Keyboard Development Board for Arduino 6pcs

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  • The MPR121 is a capacitive touch sensor controller driven by an 12C 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 12C 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 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 conting them.
  • 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 a 0.1uF capacitor to ground, which means, unless you modify the board, you can't operate the MPR121in low-supply voltage mode(1.71-2.75VDC).


Specifications： 1.0.1 ohm 1% 2W current sense resistor 2.Up to +26V target voltage 3.Up to 3.2A current measurement, with 0.8mA resolution 4.0.9" x 0.8" PCB 5.This board/chip uses 12C 7-bit addresses Ox40, Ox41, Ox44, Ox45, selectable with jumpers Package Included: 2pcs INA219 Sensor Module