Single Transistor Boost PCB Layout

[Joe Hart]

Can someone please check my layout? I think it's good, but a different set of eyes may see something I missed (and I've never done my own layout before).

Here's the schematic:

And here's my layout:


Thanks!
-Joe Hart

[John Lyons]

Looks good to me.
You don't need the 1M pulldown at the end though
as the .1 output cap will discharge through the 50K
volume pot.

[Steve Mavronis]

PCB layout wise, if you rotate that transistor counter-clockwise 90 degrees your traces could cleanly route to it more directly, but might not have to depending on its physical placement.

[Joe Hart]

Looks good to me.
You don't need the 1M pulldown at the end though
as the .1 output cap will discharge through the 50K
volume pot.

Yay! I did the layout correctly. I will get rid of the 1M at the end. Thanks!
-Joe Hart

[Steve Mavronis]

A dumb question on my part because I don't know and trying to learn - is it normal for the positive side of a cap to be grounded?

[Joe Hart]

PCB layout wise, if you rotate that transistor counter-clockwise 90 degrees your traces could cleanly route to it more directly, but might not have to depending on its physical placement.

Thanks, Steve. The issue is that I want the transistor part number clearly visible. The boost sounds super evil and the number printed on the transistor is "666"! That needs to take precedence!!
-Joe Hart

[Joe Hart]

A dumb question on my part because I don't know and trying to learn - is it normal for the positive side of a cap to be grounded?

The pedal is negative supply, so the positive goes to ground.
-Joe Hart