So you've got a newer 40-pin Raspberry Pi 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! This cable 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. The cable is ~170mm 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 A+ and B+ only! Available in black - pin #1 is marked with a white stripe! Specification * Colour: black * 40-pin to 26-pin downgrade cable * 173mm x 33mm * Weight: 14.4g https://elecena.pl/product/22710622/downgrade-gpio-ribbon-cable-40-pin-to-26-pin-discontinued 2023-03-06 https://elecena.pl/product/22710622/downgrade-gpio-ribbon-cable-40-pin-to-26-pin-discontinued 2023-12-27 https://elecena.pl/product/22710622/downgrade-gpio-ribbon-cable-40-pin-to-26-pin-discontinued 2024-09-19 https://elecena.pl/product/22710622/downgrade-gpio-ribbon-cable-40-pin-to-26-pin-discontinued 2024-11-29 https://elecena.pl/product/22710622/downgrade-gpio-ribbon-cable-40-pin-to-26-pin-discontinued 2024-11-30 https://elecena.pl/product/22710622/downgrade-gpio-ribbon-cable-40-pin-to-26-pin-discontinued 2025-04-09 https://elecena.pl/product/22710622/downgrade-gpio-ribbon-cable-40-pin-to-26-pin-discontinued 2025-05-19 https://elecena.pl/product/22710622/downgrade-gpio-ribbon-cable-40-pin-to-26-pin-discontinued 2025-08-06