Micro Bit Edge Connector Pinout

Micro Bit Edge Connector Pinout

The Micro Bit has a 25 pin edge connector. There are five large “pins” labelled 0, 1, 2, 3V and GND with 20 other pins in-between.

This diagram shows the official pin numbers as well as programmable features available on each pin.

Micro Bit Edge Connector Pinout



  • 6-7 General purpose input output (GPIO) based on configuration.
  • 6 Analogue in
  • 2/3 reconfigurable PWM outputs
  • I2C
  • SPI


6 thoughts on “Micro Bit Edge Connector Pinout”

  1. But where can I find edge connectors to fit it? 80-way 0.05″ un-keyed edge connectors are like hen’s teeth. Why on earth didn’t they use something readily available off the shelf…

    1. Looks like Maplin are starting to sell breakout boards for it. The edge connector choice seems a bit strange but I think the main requirement was that it was easy for kids to hook up wires. The small/large pin arrangement does make this easier but with the side effect that it is a bit quirky from a component point of view.

  2. Kitronik sell an “Inventor’s Kit” for the micro_bit that includes a patch panel and lets you mount the micro:bit on its (included) socket. All you have to add is the micro:bit itself. Probably worth it if you want to get started with hardware hacking, though none of the documentation includes Python.

Leave a Reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.