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.

Wednesday, August 23, 2017

Throbak Overdrive Boost

Pretty much a Colorsound Overdriver clone. Laid this out for a 125B (because of the dual footswitches) with board mounted pots. The boost footswitch bypasses the PreGain pot and only uses one side of a DPDT. Use the other side for LED wiring. If the off board wiring is confusing, check out the thread with the schematic here on FSB. The diagram is for a vero layout but the wiring is the same.


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19 comments:

  1. PappyAugust 23, 2017 at 3:23 PM

    You have posted lots of interesting pedals in August.
    This truly a goldmine for DIY pedal builders.
    Speaking of Throbak, how about doing a layout for the Throbak Strange Master?
    Another interesting RangeMaster clone is the 65' Colour Boost.

    ReplyDelete
  2. IvMAugust 23, 2017 at 6:47 PM

    Thanks David!
    I was waiting for it.
    Is much to ask to mod the board for mounted pots, like Box of Rock, etc?

    ReplyDelete
  3. UnknownAugust 24, 2017 at 2:11 AM

    isnt there soppoesed to be a 2.2M between input and ground?

    ReplyDelete
    Replies
    1. Effects LayoutsAugust 24, 2017 at 11:37 AM

      From what I read on the FSB thread, the pull down isn't necessary when the input signal hits a pot.

      Delete
    2. UnknownAugust 27, 2017 at 1:38 AM

      so, if I want to build it without the pre-gain pot I should put the resistor right?

      Delete
    3. Effects LayoutsAugust 27, 2017 at 2:31 PM

      Yes

      Delete
  4. pete_gAugust 24, 2017 at 7:21 AM

    And the 10k trimmers are to set the voltage to what?

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    Replies
    1. Effects LayoutsAugust 24, 2017 at 11:40 AM

      It's in the schematic linked above. Set the one coming off Q1 to 5k. Set the one going to Q2 to 2k or 5v. Set the one going to Q3 to 1.5K or 6.5v.

      Delete
  5. GuilhermeNovember 27, 2017 at 8:36 PM

    Hey man, you can tag this! Made one for myself and works perfectly!

    ReplyDelete
  6. f.yanez.d@gmail.comDecember 23, 2017 at 9:02 PM

    Hola, para el 2N404, cual puedo utilizar para reemplazo, gracias, saludos.

    ReplyDelete
  7. UnknownSeptember 26, 2018 at 4:31 AM

    can i build this with always on pre gain?

    ReplyDelete
  8. tonyFebruary 3, 2020 at 3:39 PM

    I don't see the IN pad on the board... Please help me

    ReplyDelete
    Replies
    1. Effects LayoutsFebruary 3, 2020 at 4:11 PM

      Read the notes under the perf side...

      Delete
    2. tonyFebruary 4, 2020 at 2:59 AM

      So, is the input pad on pin 2 Pregain Switch?

      Delete
    3. tonyFebruary 4, 2020 at 3:20 AM

      Can you check the picture on the link is correct, please? https://imgur.com/a/DF2Vrta
      Thanks a lot

      Delete
    4. Effects LayoutsFebruary 4, 2020 at 12:07 PM

      Looks good.

      Delete
  9. MassatonyOctober 15, 2023 at 12:55 AM

    Another great pedal... thanks!

    ReplyDelete

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