if i need negative voltage in my circuit and only have a positive power supply. can i use it as a negative power supply by inverting its terminal?
secondly, i have two positive supplies (made using lm317). can i make a dual supply using these two supplies by shoting the positive terminal of with ground of other and treating this shorted connection as circuit's common ground?
secondly, i have two positive supplies (made using lm317). can i make a dual supply using these two supplies by shoting the positive terminal of with ground of other and treating this shorted connection as circuit's common ground?