This might not be the right forum for this but anyway:
I would like to control my LED strips, lamps, motors using either a switch or a relay (two control options - directly with switch or via touch screen & relay board on FEZ Spider) . I attached a schematic to show you how I have it wired right now and it’s not correct because when I press the switch (sometimes I have to do it couple of times) ALL relays come on on the board - yes all 16! This happens when using short cables from DC source. If I use long cables eg. 3m this does not happen and everything works as it should. Can anybody tell me what the hell is going on?
Edit: All relays come on only if FEZ Spider is connected to relay board!