Meter schematic - fsm3.jpg (0/1)

Here it is, chaps, enjoy....

 

I read in sci.electronics.design that Paul Burridge
>) about 'Meter schematic - fsm3.jpg (0/1)', on Tue, 23 Dec
2003:

You CAN'T post a binary here; most servers will strip it off. Put it on
a.b.s.e or your web page.

 

Something's gone wrong, John. It was supposed to get posted to abse
only but not all of it came out from what I saw of the transfer status
monitor. Unfortunately, it appears Google don't provide access to this
forum any more as I can't find it to check. I *will* post it to my
website if necessary, but can anyone else confirm if Google has
dropped abse? (and if you do find it, please take a look to see if my
attempts to upload the schematic succeeded. Thanks

 

Google doesn't carry ANY binaries newsgroup, including ABSE.

--
2 days!


Michael A. Terrell
Central Florida

 

Google does not carry any binary newsgroups.

 

Paul, Why don't you E-mail it to me and I'll put it up on my webpage
and post the URL?

...Jim Thompson

 

I thought that was a great idea, Jim., so implemented it only to find
that all my efforts were thwarted. I shall have to address this
problem in the morning, wereupon I hope to have a few more working
brain cells. Wine! Who needs it?

 

Hey! I'm starting my second glass and I'm still running up and down a
ladder hanging ornaments. (We will celebrate our family get together
this year on Friday the 26th so that all family members can get here
;-)

...Jim Thompson

 

Jim Thompson wrote...

Some people have multiple celebrations. For example our
neighbors are all setup for tommorrow afternoon. Some in
that family may well go from the 24th to the 25th and 26th.
Eventuially it may seem a chore.

Thanks,
- Win

whill_at_picovolt-dot-com

 

Family is never a "chore".

We juggle our get-together date to accommodate older grandchildren
that want their own "at-home" Christmas, a prosecutor that may draw
holiday murder duty, a water-services manager on high-alert, etc.
Just your ordinary regular American family ;-)

...Jim Thompson

 

I read in sci.electronics.design that Winfield Hill

Indeed. Last year, I had four days consecutive, at different places. I
needed eight days to recover. This year, it's one and a quarter days,
but still at three different places.

 

I've finally managed to get the blasted thing up on the following URL!

http://www.burridge8333.fsbusiness.co.uk/fsm3.jpg


I suspect the 380 ohm load (which is the meter) is loading it down a
bit, though. :-( Should I add a follower stage?

 

We celebrate The Twelve Days of Christmas.

Al

 

I read in sci.electronics.design that Paul Burridge
>) about 'Meter schematic - fsm3.jpg (0/1)', on Wed, 24 Dec
2003:

I can't find it:

Index of /
Parent Directory
bot1.jpg
bot2.jpg
bot3.jpg
bot4.jpg
bot5.jpg
contents.txt
photo1.jpg
photo3.jpg
photo6.jpg
photo7.jpg

 

Alternatively,

Adding a coupling cap to the final diode(!) and changing to a schottky
diode improves meter sensitivity a bit more and gets over the loading
problem above. See:

http://www.burridge8333.fsbusiness.co.uk/fsm(revision1).jpg

The simulation showed 11mV p-p output across the load resistor for the
100uV p-p source. Not bad in three simple stages...

 

That's the right index contents alright. But I get the new file(s)
shown in addition - and they display okay. So I can only imagine your
server hasn't caught up yet? They are definitely there, though. Keep
trying!

 

I've just re-checked and the first one isn't there for some reason. My
apologies. Very odd. Never mind, the fsm(revision1) pic is probably
the better of the two to look at, anyway.

 

I read in sci.electronics.design that Paul Burridge
>) about 'Meter schematic - fsm3.jpg (0/1)', on Wed, 24 Dec
2003:

The filename is not 'fsm3.jpg' now , is it?

I can see neither rhyme or reason in the biasing, but at least you
haven't got anything bottomed now. Your AC coupled diode still won't
work.

 

On Wed, 24 Dec 2003 14:41:33 +0000, Paul Burridge

[snip]

You keep missing the point about that coupling cap. HOW does it move
charge ??

...Jim Thompson

 

It moves charge by virtue of having an AC voltage across it. Yes, I
know it's in series with a diode so that doesn't make sense in this
case. But try simulating it for yourself if you don't believe me. You
only have to sim the final stage and apply an arbirary sine source to
its input to represent the prior stages. Sorry you would know that,
anyway. But try it! Then tell me it doesn't work...