I built a wall wart power supply using the LM317 regulator.
Actually it is not really a traditional wall wart but a old laptop supply.
Normally PSUs are fused at the mains. I really don't have access to the main so where should I fuse it? At the input to my supply or at it''s output?
Actually it is not really a traditional wall wart but a old laptop supply.
Normally PSUs are fused at the mains. I really don't have access to the main so where should I fuse it? At the input to my supply or at it''s output?