[sdiy] Thomas Henry's Potpourri Module questions

[Rykhaard D.A.M.I.A.N.]

On 1/1/06, Pete <23isgood at gmail.com> wrote:
>
>  So is the external threshold input on the comparator is just a fixed
> value since the pot is disconnected from the circuit,


Yes.  :)  As long as the Voltage that you're popping into the External is
unchanging - your Reference at the Comparator, is unchanging. :)

unless you plug in an LFO or something like that? On the lag processor the
> buffer input does not seem to be very useful?


On the Lag processor, the buffer is VERY useful - for the Lag processor's
output. :O :)  If you didn't have a buffer after that cap, then as soon as
there's a place for the Cap. to discharge to, it will.  :O :(
The Buffer itself, is giving the cap an almost impossible route, for
discharging.  The only other place that it can discharge to, is back where
it came from.  (I.E.  A lower voltage at the Lag Input, will allow the Cap.
to discharge to that level, through the Lag Time pot.)
Outside of THAT - if the Buffer is used by itself, it is still very useful
for buffering the input from something else, where it may be needed..

I will double check everything again but as far as I can tell everything
> else is working fine except the Lag pot. Also I'm using a 2 - TL082's since
> I don't have a TL084 can this be a prob?


Here - just make sure that you check the pin connections on the 082s.  For
reference:

TL084, TL084, LF347, LM347:
1 - opamp #1 Output
2 - opamp #1 - Input
3 - opamp #1 + Input
4 - +V
5 - opamp #2 + Input
6 - opamp #2 - Input
7 - opamp #2 Output

8 - opamp #3 Output
9 - opamp #3 - Input
10 - opamp #3 + Input
11 - -V
12 - opamp #4 + Input
13 - opamp #4 - Input
14 - opamp #4 Output

TL082, TL072, LF353, LF412, RC4558, RC4559, ad nausum
1 - opamp #1 Output
2 - opamp #1 - Input
3 - opamp #1 + Input
4 - -V

5 - opamp #2 + Input
6 - opamp #2 - Input
7 - opamp #3 Output
8 - +V

thanks for the help
> pete
>

No problem. :)

--
Take care,
Warmth and Peace,
Ryk

http://deathlehem.bravehost.com/damian.html - D.A.M.I.A.N.;s webpage - Dec
2705 update
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