Hello,
new to the hobby but I have started to play with circuits. Saw a cool little pcb that turns an old computer power supply into a lab bench power supply. so I had a go at it. Pictured below. here is the funny thing. When you hook up to a battery you have a positive and a negative but the PSU board only has a -12v. Is it a fair assumption that the negative 12v post can be used for all three voltages. Or should I be completing my circuit to ground?
new to the hobby but I have started to play with circuits. Saw a cool little pcb that turns an old computer power supply into a lab bench power supply. so I had a go at it. Pictured below. here is the funny thing. When you hook up to a battery you have a positive and a negative but the PSU board only has a -12v. Is it a fair assumption that the negative 12v post can be used for all three voltages. Or should I be completing my circuit to ground?