You purchased a Raspberry Pi Model B+
that you want to have work with some old kit or plate or breakout or something and it uses the classic 26-pinout. Very frustrating, it is...unless you have this ingenious 'downgrade' GPIO cable. It has a 40-pin socket on one end, but only the first 26 pins have a cable and the other end matches any sort of Cobbler
or PermaPi or what-have-you.
Cable is 6" long, and pin #1 is marked with a white wire. This cable is not compatible with the Raspberry Pi Model A or B
- It's for the B+ only!
Available in Adafruit Black - pin #1 is marked with a white stripe!