Would someone mind looking at my onesided layout to diagnose the error?

[jimilee]

It's the royal blue overdrive. I don't see where I went wrong.

 

[temol]

Missing R5?

 

[jimilee]

Missing R5?

It's there above the IC

 

[temol]

You should make all the traces visible (transparent components?). Now it's hide and seek

Why did you make GND trace so thin compared to signal traces?

 

[jimilee]

You should make all the traces visible (transparent components?). Now it's hide and seek

Why did you make GND trace so thin compared to signal traces?

Sorry about that, I realized you couldn't see what was going on. I updated it. So, I made a ground plane, ultimately, that's why the ground is so thin.

 

[temol]

First of all - what's the issue with it?

I've spotted one change from the schematic: C100 before R100.

 

[jimilee]

First of all - what's the issue with it?

I've spotted one change from the schematic: C100 before R100.

Audio breaks up on the treble pot. Good catch, C100 is just for power filtering. For the most part, it can be put anywhere in the first of the power section.

 

[temol]

Have you checked for a short between the solder pads in this area?

 

[jimilee]

Have you checked for a short between the solder pads in this area?
View attachment 68155

Ok, went through everything with an xacto knife. I have audio now, but it’s very low. I’m wondering if my layout is correct.

 

[temol]

Your layout seems to be correct.
You should check the value of R18. Maybe it's 20k? or 200k?

I'd also check signal level at marked points.

 

[jimilee]

Your layout seems to be correct.
You should check the value of R18. Maybe it's 20k? or 200k?

I'd also check signal level at marked points.
View attachment 68179

Thank you sir, will do.

 

[darwin999]

I agree, layout seems fine. So maybe a component issue (e.g., wrong part value), or short, etc. And R18 is 2k, per PedalPCB schematic.

 

[temol]

So how's it going?

 

[Coda]

So how's it going?

Pretty good, how’s it going with you?…

 

[jimilee]

So how's it going?

Working on it on lunch and after work today.

 

[jimilee]

So how's it going?

Ok, so update. I watched another board without the ground plane and it works. It starts motorboating when I turn up the gain past about 11. It’s got a lot of gain on tap, so I don’t k ow if it’s cross talk on the signal or something else. I haven’t had a chance to audio probe just yet.