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PCB Progress

A project log for PiModulos

A module EHX Big Muff Pi clone PCB, the PCB can be populated with any version of the transistor Muff circuit

avrAVR 05/14/2016 at 18:410 Comments

So I have been working on and off on the new PiModulos V2 PCB. For the most part component placement has been figured out, next will be fine turning placement, board size and then routing. Here is what I got so far:

As you can see I decided to keep the tone switch or the tone wicker as EHX officially calls it, I found a nice switch that mounted nicely on the PCB so it stayed. You will also notice the connector pads on the sides of the board, those were intended for wiring the PCB into a pedal enclosure with a 3D3T switch, and 1/4 TRS connectors, I have since decided that I don't want to use this wiring style since it will be messy, so I'm gonna combine all the signals into a single connector and connect it to a dedicated PCB with a ribbon cable. Also the mid switch and additional cap are still in the tone circuit, I decided that I really should try it out since it might be something I really want for my personal sound tastes.

So for PCB topology, its going to be a two layer board with the bottom layer acting as a ground plane. There will be minimal traces on the bottom with special care taken to prevent crosstalk and capacitive coupling between traces. As for trace width I will be using about 20-25 mil, its roughly the width that most pedals use from my observations and experience tearing them down. I'm also considering trying out OSHPark's new 2OZ copper service for added robustness, it cost the same as the regular services, oh yeah did I mention I will be fabbing with OSHPark lol.

My design is sort of turning into a hybrid boutique meets industrial pedal, combining design elements of handwired pedals and the SMT mass produced designs made by the big manufactures, cant wait to see how it turns out! Stay tuned folks!

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