roothorick
Active member
I really have to challenge the common wisdom of checking for ripple with a multimeter set to AC. I think most meters won't produce good values when in AC mode probing DC.
I've tried two different meters on a power supply I'm pretty sure is good... One goes "OL" for a second, then counts down from 16, and then repeats. The other gives me a constant 10V reading (I'm checking 5VDC). I frankly don't trust either.
IMO, to check for ripple, you'll need a scope... Well, a speaker might do in a pinch.
I've tried two different meters on a power supply I'm pretty sure is good... One goes "OL" for a second, then counts down from 16, and then repeats. The other gives me a constant 10V reading (I'm checking 5VDC). I frankly don't trust either.
IMO, to check for ripple, you'll need a scope... Well, a speaker might do in a pinch.
