MPR121 Capacitive Touch Sensor 12-Keys – I2C – 3.3V

CAD 2.69

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Availability: In stock (can be backordered) SKU: 26249
Quantity 3 - 9 CAD 2.42
Quantity 10 - 24 CAD 2.35
Quantity 25 + CAD 2.29


Add up to 48 touch sensor keys with the MPR121 Capacitive Touch Sensor to your next microcontroller project with this easy-to-use 12-channel capacitive touch sensor breakout board. It connects to almost any microcontroller by I2C and allows you to set it to 4 different addresses, making it possible to run 4 boards on the same I2C bus.

A touchpad can be any small piece of metal, like a coin or a piece of copper foil, connected to one of the touch input pins.

The I2C address is set to 0x5A by default but can be changed by opening the ADD jumper on the back of the module and connecting the ADD pin with one of the other 3 address setting connections.

Please note, the MPR121 Capacitive Touch Sensor is a 3.3V device. Therefore, the power supply and logic level must be between 2.5 and 3.6V.

Easy-to-use libraries for Arduino and other platforms are online available (on GitHub for example).

Dimensions of the PCB: ca. 20 x 30 x 2.5mm

Freescale / NXP MPR121 Data Sheet


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