Re: ESR meter construction question

I actually carefully looked at the PCB lit from behind before installing
anything (WOW! I actually followed the instructions! :-) and didn't
notice any problems. I'll check it again and look for any solder shorts.
I found it impossible to construct w/o referring to all three images
(picture!!!, schematic, and layout with part numbers) so I worry that
something was installed incorrectly. Thanks!

Kurt Mahan <kmahan@xmission.com> on 01/21/2000 09:52:46 AM

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Subject: Re: ESR meter construction question

When I built mine I had a few problems too. Careful examination of the
pcb showed that when they tinned it they used a little too much. So in
areas where I hadn't installed anything there were a few minute shorts
between the traces. You might want to check for that.

My problems were display problems -- and I checked/double checked/got the
scope out/etc.

Kurt

> I finally built my ESR meter kit from John and it "works" (it powers up,
> displays "EA" and then "- ") but when the measurement leads are tied
> together in order to zero them out the value just keeps fluctuating
wildly.
> The fluctuation is large and happens a few times a second. If I press
the
> button to zero them out it turns the meter off. I'm doing this with the
> ends of the wires off the PCB (the PCB has not been installed in the case
> yet) clamped together. Any ideas?
Received on Fri Jan 21 07:41:15 2000