AC or DC?

is there a way to tell if something i AC or DC power if you dont know, my multimeter will read ac on the dc setting and vice versa.

dog digger6 years ago
Use a DC motor. If it's ac, it will vibrate. If it's DC, it will just spin normally.
Just make sure the voltage of the motor is matching the source of power.
Re-design7 years ago
If it's just a transformer with nothing else, then the output will be ac. You need diodes or rectifiers to change ac to dc.

Post a link to the transformer.
Jimmy Proton (author)  Re-design7 years ago
i decided not to get the transformer, there is a sign shop not far from my house.
erik_mccray7 years ago
if its DC input it will be DC out put unless it has a inverter in it witch Is unlikely