I've got the PiRack yesterday and I've already tried to connect few things, including PiFace, LedBorg and ribbon cable to breadboard with temperature sensors connection. BUT. all of them worked without external power supply (both at once and separately tested), except for the PiFace! Even if only the PiFace is connected alone via the PiRack, it doesn't seem to be responding to Python commands...
To be on the safe side, I've swapped the jumpers from external to Pi power supply (no using external power at the moment at all), didn't touch the ISP jumpers at all (they are in default out-of-the-box positions.
Does the PiFace need an external power supply attached to the Pirack to be working?
