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.

Tuesday, August 21, 2018

Maxon CP101 Compressor

Stumbled across the schematic for this compressor and couldn't find a layout for it. So I drew it up. This follows the original red box version, not the black box reissue. It's an optical compressor and apparently fairly subtle. I couldn't find any info on the vactrol used in the original–sockets are your friend. Should be an easy fit in a 1590B.


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18 comments:

  1. Balma GAugust 24, 2018 at 10:49 AM

    Theres any difference with LM741 chip?

    ReplyDelete
  2. UnknownAugust 25, 2018 at 9:11 PM

    Is this verified yet ?

    ReplyDelete
  3. pete_gAugust 28, 2018 at 7:45 AM

    Is that 500 ohm trim to regulate voltage?

    ReplyDelete
    Replies
    1. Effects LayoutsAugust 28, 2018 at 12:41 PM

      No, it allows you to adjust the high pass filter I think.

      Delete
  4. UnknownSeptember 21, 2018 at 12:10 AM

    verified.. 👍

    ReplyDelete
  5. UnknownDecember 5, 2018 at 2:35 PM

    Does anyone used germanium transistors ? Thank you!

    ReplyDelete
  6. UnknownFebruary 15, 2019 at 9:48 AM

    How should the photoresistor resistance be ?

    ReplyDelete
  7. UnknownNovember 10, 2019 at 6:38 AM

    what is LDR and what is the value ??

    ReplyDelete
    Replies
    1. The Rev3rsOctober 19, 2022 at 4:43 PM

      A LDR is a "Light Dependent Resistor", there is not a specific value, you can use the GL5528 LDR

      Delete
  8. UnknownJanuary 18, 2020 at 6:52 PM

    How to reduce sound hiss?
    Please reply?

    ReplyDelete
  9. UnknownMarch 22, 2020 at 10:29 PM

    DON'T use a 741! They hiss really badly

    ReplyDelete
  10. AsangAugust 4, 2020 at 2:08 PM

    This comment has been removed by the author.

    ReplyDelete
  11. AsangAugust 4, 2020 at 2:13 PM

    Verified..
    But, I want to know that 500ohm trim pot..., what is that for? Is it a attack/release knob?

    ReplyDelete
  12. JunmarFusilleroNovember 19, 2020 at 1:19 AM

    Im not a compressor fan,but i made this for a friend,you can verify this,it works,with some tiny noise but bearable,and..i still dont know what a compressor really do 😅😅😅

    ReplyDelete
  13. DerekJuly 1, 2023 at 6:58 PM

    Is it normal to have a little bit of clipping in this pedal? I tried replacing the LDR with various resistors and found that, the higher the resistor, the more clipping I got. Maybe I need a brighter LED, or a different LDR?

    ReplyDelete
  14. AsangNovember 13, 2024 at 5:51 AM

    Try green led

    ReplyDelete

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