NOTE: This product has been retired from our catalog. If you are looking for more up-to-date info, please check out some of these resources to see how other users are still hacking and improving on this product.

• SparkFun Forum
• Comments Here on GitHub
• IRC Channel

MPR121 Capacitive Touch Keypad (SEN-12017)

The MPR121 capacitive keypad uses the MPR121 and 12 touch sensitive pads to give you a simple 'keypad' with an I2C output. The board also has four mounting holes allowing it to be used as na input system in place of traditional buttons.

Note: This is uses 3.3V logic. You will want to use a logic level converter with this for 5V systems.

• /Firmware - Any firmware that the part ships with,
• /Hardware - All Eagle design files (.brd, .sch)
• /Production - Test bed files and production panel files

• Hookup Guide - Basic hookup guide for the MPR121.

• SEN-10250 Version 1.3

The hardware is released under Creative Commons Share-alike 3.0.
All other code is open source so please feel free to do anything you want with it; you buy me a beer if you use this and we meet someday (Beerware license).