This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Thursday, August 13, 2015

MXR ZW-44 Berzerker Overdrive

Got a request for Zakk Wylde's signature overdrive from MXR. It's essentially Boss SD-1 Super Overdrive without the buffers. Original units have MC33178P, but socket and experiment with dual op-amps. You can use right angle PCB pots to mount them on the board from the solder-side.





20 comments:

  1. Hey guys! One doubt:
    - The piece labeled "C B E" is a jumper?

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    1. That's a transistor. MPSA14 darlington type.

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  2. thanks. I'll finish this week and will post the result.

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  3. I have the same error as crunch box. I'm ashames cause not accomplishing to do that. I'm beggining in this process. I'm thankful for the patience.
    One question, There's a way to invert the position of 3pdt key? there's the possibility to be using upside down?

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    1. No worries. You can't really invert the switch unless you turned it sideways, but then you wouldn't be getting bypass signal. Double check your wiring and make sure you don't have any shorts on the circuit board. Did you etch a pcb or are you using perf?

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    2. I made the pcb at home. I drowned with a dvd pen and used Iron Perc. I'm thinking that i Had some problem with static energy. Cause there was a hole I needed to open a bit more, and I drill it again, with some components at their places. Maybe this.
      I'm verifying three pedals: Berzerker overdrive, Crunch box and mxr microamp.

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  4. Verfiied! =D
    Works so well!!

    I tryed before, and fixed my error, I inverted the position of diodes.
    Thanks @dtgehring!! You're the Man bro!

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    1. Great! Glad you got it working.

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    2. Thanks Bro! as we say in my country: "tamo junto" it's like "we're together"
      cheers!

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  5. Do you know what we can do to increase volume to a Project?

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    1. You can always through a booster after it. Several good ones on this site. Though I believe this thing should be plenty loud. Are you not getting max volume above unity?

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    2. The volume is so low than dod 250, maybe the half capacity. but I made a microamp to fix this in my pedalboard. Thx!

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    3. This Project is amazing: A warm tone without the noise, I'll record a demo.

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  6. Please where I can find the schematic. Thanks

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  7. I build this one and the gain pot doesn't make much gain/drive. How to increase the drive? thanks

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  8. Hello
    Please tell me what software did you use to design the pcb?

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