Lindy Mayfield sas.com> writes: >=20 > Up until now, my understanding of electricity and safety has been pretty basic. Batteries around the > house, 9v etc, the development boards, I've been playing with, and so on, I don't worry it can hurt me. If it > is household 220 v AC, then I treat it with respect. Even if I do know the light switch is off, I still test it > with a multimeter to be double sure. >=20 > But I don't know what comes out of this power supply. It goes up to 30 volts and 1 Ampere. So as an example, just > touching wires on motors like I would with a battery, can this thing be set high enough that I could get a > (bad) shock? >=20 > Thanks! > Lindy 30 volts is certainly enough to feel unpleasant, especially if your skin is in reasonable condition (i.e. not dried out). With wet hands many people can feel a 9v battery through their skin. However, it won't be anything like the kind of shock you would get from hig= h voltages, and is not usually enough to be dangerous in skin contact situations. Electrical safety regulations set a threshold of 50v were insulation requirements etc. become much stricter. Mike --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .