Raspberry Pi B+ GPIO compatibility

There are many plug in boards for the Raspberry Pi model B (2 x 13 pin connector) which are now not compatible with the Model B+ as this has 2 x 20 pin connector. Even if they plug in, they can interfere with some of the components as the position of the GPIO has moved.

Fortunately the entire Custard Pi range is compatible with the Model A, B and the Model B+.

Custard Pi 6 8 Relay Card for the Raspberry Pi

This post describes the Custard Pi 6 circuit. It shows users how to customise this PCB assembly for different purposes. For example, the board can be fitted with fewer relays to save cost or supplied from a single 5V supply.