"YD" wrote in message
...
J.P. wrote:

On Wed, 04 Jul 2007 05:24:53 GMT, "Michael A. Terrell"
wrote:

"J.P." wrote:

On Tue, 03 Jul 2007 11:22:41 -0700, John Larkin
wrote:

On Tue, 03 Jul 2007 07:37:11 -0500, J.P.
wrote:
http://alytus.auksa.lt/esr/

Bizarre, complex, and doesn't actually measure ESR.

John
Take that up with the inventor


Inventor? Too bad he wasn't a designer.
It does measure ESR and is a viable citcuit. Best look again.Just
because you read some from Eyesore on the RAT group doen't mean it is
true...and disrespecting a well meaning vet doesn't do so much for
your position either...these USENET trolls can kiss amy ass...although
I am not gay like they are...

Actually that bridge is completely misconfigured. It won't measure
anything sensible *ever*. Now go ahead and tell us what you think it
does, and why.

- YD.



Actually, the bridge is *not* misconfigured. If you think it is, please tell us
how it is misconfigured, and how it *should* be configured.

The capacitor under test is effectively in parallel with R16, the lower left
part of the bridge. The ESR of the capacitor will unbalance the bridge. The
unbalance is amplified by U1C, fed to U1D where it is rectified and filtered,
then measured by the meter.

That's my take on the operation.. now, please tell us why it doesn't measure
anything sensible, *ever*.

--
Dave M
MasonDG44 at comcast dot net (Just substitute the appropriate characters in the
address)

"In theory, there isn't any difference between theory and practice. In
practice, there is." - Yogi Berra