Raspberry Pi Pinout


  • GPIO (General Purpose IO)
  • SPI (Serial Peripheral Interface)
  • I2C (Inter-integrated Circuit)
  • UART (Universal Asyncronous Receiver/Transmitter)
  • Ground
  • 5v (Power)
  • 3v (Power)

Pi Cap

The Pi Cap adds precise capacitive touch, distance sensing and high quality audio to any Raspberry Pi with a 40 pin GPIO connector. The 12 electrodes can be connected to anything conductive to create a touch or proximity interface. Additionally the Pi Cap includes a user-programmable RGB LED and a multi-function button.

The Pi Cap software is in the official Raspbian repository, so to install the software simply enter:

sudo apt-get update
sudo apt-get dist-upgrade

Reboot the Raspberry Pi and enter:

sudo apt-get install picap

The Pi Cap provides 7 digital I/O pins, brought out from the 40-way Raspberry Pi GPIO connector – pins 12, 13, 15, 16, 18, 22, 36. The Pi Cap package contains plenty of code examples written in C++, Python and Node.js that are supported by the Pi Cap library.


  • Made by Bare Conductive
  • 40 pin header
  • Needs 3v3 power
  • Uses 9 GPIO pins
  • Communication over I2C
  • 0x5C: MPR121
  • More Information
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Pi Cap