As of revision 2 boards, there is space to add some header pins to get access to eight more GPIO pins. These are found on the Header 5. Highlighted below.
Here are their functions;
- P5-Pin1 - 5v0
- P5-Pin2 - 3.3v
- P5-Pin3 - GPIO28
- P5-Pin4 - GPIO30
- P5-Pin5 - GPIO29
- P5-Pin6 - GPIO31
- P5-Pin7 - GND
- P5-Pin8 - GND
I needed some more pins for PiBBOT as I want to change my TFT to a character OLED which needed more pins then I had spare, so I decided to make use of these extra pins.
Here are the results, I soldered the head onto the underside of the Pi so I could plug in an IDC cable.
Continue reading Expand the Number of GPIO Pins on the Raspberry PI