[sonichead]

I'm having a terrible time testing my Cmoy, I've yet to see any results after doing all kinds of things with aligator clips. (I have a 150 board finished) Nothing works, not even a hum!

Thus far, I know I need to solder the output jack to the two output pins on the board, and also to the ground spot on the board.

As for everything else (input jack, and POT) I am totally baffled! I think the input jack goes through the pot before it gets to the board, but I am not sure.

I am using the 6 pin panasonic pot:
1) L - output
2) Ground
3) Ground
4) R - output
5) R - input
6) L - input (when looking at the pins with the rod pointing at the sky)

And here's the board:

Can anyone explain how to wire the pot and input jack?

Edit: What is the v+ thing in the picture, do I need to connect that to anything or jump it?

 

[PeterR]

Didn't we have this a few days ago? Ok, second try.
There are three connections on the input jack. Left (tip), Right (ring) and Ground (sleeve).

The Ground goes to 'gnd' on your board.
Left goes to the left input of the pot. The left output of your pot then goes to 'l.in' on the board. The pot's left ground is connected to board 'gnd'. Same for the right channel: input jack->pot input; pot output->board input; pot ground->board ground

you need to run a wire from the 'v+ thing' to the supply voltage (Edit: and as this is the supply for the opamp, omitting this means nothing will work...)

 

[sonichead]

Quote:

Originally posted by PeterR Didn't we have this a few days ago? Ok, second try... you need to run a wire from the 'v+ thing' to the supply voltage.

Yes, we did!

Ok, where is the "voltage supply" i need to connect the V+ spot to?

 

[Arzela]

Quote:

you need to run a wire from the 'v+ thing' to the supply voltage.

..unless you already have the power
hooked up. If you do, the "v+" shouldn't
be connected to anything...

I'm having a strange feeling of d&#233j&#224 vu...

 

[Arzela]

Connect a wire to the V+ pad near the power caps.
Do the same for the v- pad.

These wires connect to your battery.

 

[sonichead]

this post is now useless

 

[PeterR]

 

[Arzela]

Yes, that's what that wire is, I presume; a jumper
from that pad to V+ near the cap.

You need this to power the op amp.
There should also be a jumper, or wire, from the V- pad to the V- pin of the opa.

 

[sonichead]

Thanks guys, I was making that picture myself but peter beat me to it!

 

[grahamndodder]

Aren't his C1 caps (in the amp circuit, not the power supply) too small? They don't even connect to the pads where his test wires stick up (and presumably where his inputs will be.)

That's a pretty big spark gap for a line-level signal to jump...

GnD

 

[PeterR]

That's not a pic of sonic's amp but from tangent's tutorial. Being the sneaky guy he is, I wouldn't rule out a backside connection

 

[grahamndodder]

D'Oh!

Got it. I couldn't see that from this angle. Turned my laptop around and was able to see it clearly from the other side.

GnD