I'm making a selectable power supply so as to need only one set of leads I want to have led indication on each leg. Do I just power the led from the output of each leg?do I need a boost converter off of each leg to compensate for led voltage?

 

Not a mind reader here.

What voltages? AC or DC?

what is a "Leg"?

Schematic would help.

 

Not a mind reader here.

What voltages? AC or DC?

what is a "Leg"?

Schematic would help.

Thanks for reply
It will have DC voltages. 12,5,3 off of standard atx power supply. No schematic ATM.

 

New here, saw this and have to ask, why are you limiting your project to voltage 'selection'? Why not simply tap the 12 volts and make it adjustable from 1 - 12 as needed? You could even get fancy and add a simple analog meter at the vOut but be sure to use a dvm and adjust the set screw on it to insure it reads correctly.