It seems ages ago but the first add-on board I designed for the Raspberry Pi was a prototyping board. That was even before I had a RPi to play with. Well we've finally got some
PCB's back from the manufacturers and here is the finished result:
The version differs from the first version as we removed the 2.1mm Power Socket and used surface mount components, hence the SM in its name. The board was laid out using Design Spark PCB and you can find a pdf copy of the schematic is
here