have a power board that has 7-20VDC coming in and have regulators that drop it down to 5VDC and then to 3V3VDC. is it ok to use a common ground plane for all the different voltages or should the gnd from the main incoming voltage to the 5VDC reg be seperated from the other gnds? there will only be tracks on the top of the board for signals and positive voltages.
thanks in advance,
bob
thanks in advance,
bob