Voodoo Lab Overdrive

by gaussmarkov

Voodoo Lab Overdrive layout

I have various reasons for putting this one together. My interest was peaked when the Voodoo Lab Overdrive was associated recently with the Fulltone OCD. I was also looking for a relatively simple circuit with op-amps that I could use for an Eagle layout tutorial that I plan to write. In addition, I have been working up my understanding of op-amps through writing a series of tutorials and the divided negative feedback tools are really useful with this circuit.

There are a bunch of mods to consider with this circuit, all of which have been applied to other stompbox circuits over the years. And if the reports are accurate, similar mods appear in the OCD as well. If you want to try mods on a breadboard, I have prepared a basic breadboard layout and posted it in the IC-Based Overdrive project on Aron’s forum as Voodoo Lab Overdrive. The mods are listed on my version of the schematic.

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9 Responses to “Voodoo Lab Overdrive”

  1. guega said:

    Hi I am Brazilian and I have 1 like this in the diagram how can I put a led idic to know that this activated or not I am grateful also manufacture guitars

    Posted 08.12.2009 at 12:44 pm

  2. Bruno L said:

    You sould probably use a Millenium Bypass scheme if you want to use DPDT switches and Led´s. Google it and you´ll find lots of stuff about it. PS: I´m also brazilian =)

    Posted 29.04.2010 at 4:01 pm

  3. DIYtechgear said:

    I had a great time making this baby! One of my first “working” builds. A very neat circuit that can be used as a clean booster if needed. Then turn the gain up and hear it slowly creep in and grunge it up a little. Really enjoy the possibilities of sounds this simple two knob pedal can put out. Once again great work Gauss!

    Posted 17.01.2012 at 3:07 pm

  4. jean luc said:

    Hi my name is jean luc and i live in FRANCE , i have all parts list but i have not a PCB for the Voodoo Lab Overdrive.
    is it possible to sendand buy me this
    PCB ?
    thank you for all.
    Jean Luc

    Posted 20.02.2013 at 8:21 am

  5. Roberto Simões said:

    Hi There, Nice work here…

    I’m building a VLO and I’m just wondering: Is R1 (2.2M) a ‘pulldown resistor’? Just curious… thanks.


    Posted 18.10.2013 at 1:16 pm

  6. Banana Butty (Fulltone OCD) | JVGthirteen said:

    […] pointed out, the OCD is almost certainly a tweaked version of an earlier (90s?) pedal – the Voodoo Labs Overdrive pedal.  To my eyes, the starting point for the VL Overdrive would have been the old MXR Distortion […]

    Posted 14.11.2013 at 8:00 am

  7. Luis Angel said:

    Hola gaussmarkov saludos desde Lima Perú. Mi pregunta es que valor tiene la resistencia R13 solo dice 47 .. 47 k?? 47 ohm?? por favor espero tu respuesta y muchas gracias de antemano!!

    Posted 21.06.2014 at 8:52 pm

  8. gaussmarkov said:

    Hi Luis,

    It’s 47 ohms, as listed.

    All the best!

    Posted 25.06.2014 at 12:30 pm

  9. Luis Angel said:

    Gracias gaussmarkov !!! yeahhh!!

    Posted 14.08.2014 at 2:05 pm