Cabling for 40-Pin Raspberry Pi Models (A+, B+ and 2 B)
The newer Raspberry Pi models have a 40-pin J8 expansion header, as opposed
to the 26-pin P1 expansion header of the original Model A and Model B. The
LPC1114 I/O Processor Expansion Board is shipped with a 26-pin cable, which
will require some modification to connect to the 40-pin J8 expansion
- Use a downgrade cable like this one from adafruit.
- Use a straight 40-pin cable like this one from adafruit. The lower
end of the 40-pin connector will hang over a clear space on the LPC1114 I/O
Processor Expansion Board.
- Crimp a 40-pin connector onto the supplied cable, just inside of the
existing 26-pin connector on the Raspberry Pi end. When you plug the 40-pin
connector onto the Raspberry Pi 40-pin J8 expansion header, the 26-pin
connector will dangle over a clear space on the board. Such a cable will work
with any Raspberry Pi.
- Clip pins 27 and 28 on the Raspberry Pi 40-pin J8 expansion header, to make
room for the end of the 26 pin connector on the supplied cable. This is the
easiest solution, but will render the Raspberry Pi unable to detect a HAT at a later
Questions or comments to Philip Munts firstname.lastname@example.org
I am available for custom system development (hardware and software) of
products using the Raspberry Pi or other ARM microcomputers.