I've managed to get my addon board working with my Raspberry pi!
Now you can connect things like the display in the photo, but also the 7-fets board (7* 1A active-low outputs), temperature sensor (LM35, K-type thermocouple), 3-fets (3* 5A active low outputs), servo (drives 7 RC-servos).
In the lower left, you see our ftdi_serial board that allows you to connect TTL-level uart devices to a PC. In this case, the coloured wires could be connected to the UART on the raspberry pi. That was connected up until just a few moments ago. You get the boot messages and a login prompt on there with the recommended debian distro.





