Cgs synth

>
> I can't seem to find a straight foward explanantion of audio jacks,
> specifically 3.5 mm jacks. I need to figure out exactly which patch
> point on the jack is the input, output and ground. I don't have a
> schematic for any of the other modules that use 3.5 jacks, so I

can't

> logically figure this one out. Can anyone point me out to a

simplified

> explanation or book or anything that might help. I hope this list
> believes in the no stupid questions matra, this is certainly one.

Oh man, Don! If I didn't ask stupid questions, I'd be nowhere!

If you have a DVM or any kind of continuity tester (light bulb,
wire, battery) and a 3.5mm plug, you will be able to see which lug
on the jack correlates with which lug on the plug. If your jacks
are the open type, you will be able to see which lug is part of
which element - the sleeve (ground), the tip (signal), and the
normally-closed contact with the tip (for sending the signal to
another point when there is no plug inserted).

>
> Also, according to the schematic the input going through the 100k

pot

> needs to grounded. I think that means I need to wire the ground

output

> of the pot to the "0V" in on the pcb thats between the 2N3906 and

15k

> resistor. Can someone verify that this thinking is correct?

You are correct, sir! Zero volts is our reference (some call it
ground) and return current path. You're dividing the signal voltage
between the input stage and zero volts with the pot acting as a
voltage divider.

>
> I'm probably going to have more questions once i get the module all
> wired up.

Good. Read my thread about my little VCO woes. We all hit snags
from time to time. Help when you're able, ask when you need help.

>
> Thanks Alot,
>
> Don

You're welcome, and welcome to electronics!

Chub