ESR Meter

[bearmos]

MickM, thanks for documenting this so well.

I think I remember seeing you reference to the original one a while back, but there's definitely enough information here to replicate this easily now. This should definitely come in handy for those pesky electrolytics on the broken SMPS i have laying around ;-) It looks like it should probably come in under $15 after all the odds and ends are purchased (analog current meter, HV caps, plus, etc), so it should pay for itself immediately since I won't be blindly replacing all the caps on the board.

[bearmos]

I don't remember posting about this before.

It was wingnut I was thinking of, looks like you were just involved in the discussion, apparently.

I found a regular 50uA meter - Finally!!
So I just redid the layout and boxed it all up.

I figured I'd just swipe one from ebay.

I'll probably be sticking with lower voltage rails and draining the caps as a precaution (I'll still throw in some 450V caps anyway). If I wind up replicating this, I'll let you know how it turns out (I always seem to contemplate more projects than I complete:)).