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.

Monday, August 17, 2020

Spaceman Atlas III

Hope everyone's staying safe and healthy. Today's layout is a unique preamp booster from Spaceman Effects, the Atlas III. It uses some FETs I'd never heard of in conjunction with a couple low gain silicon BJTs (use something in the 175-225 hFE range). The switch controls the phase of your signal (it's internal in the original). Schematic can be found here for reference.

Also, I updated the Make a Difference page on the website to include a few funds working to help in the aftermath of the Beruit explosion. It's killed well over 150 people, injured 6000 and left over 300,000 people homeless. If you can, do some good, offer some home and help out some people who are really hurting.


  1. depletion mode MOSFETS, just like the ones used for the Openhaus/Lighthaus pedal. hard to come by around here.

  2. Not sure where you are, but RS Compnents have them. Code is 829 3250. They are designed for high voltage circuits up to 500v.

  3. Yes, i used couple with Openhaus/Lighthaus pedal too, here is deficite mosfets. & 2n7000 I know will not work there!

  4. It works! Used PN3565 for the NPNs and made the 180nFs out of 100n and 82n caps.
    surprising that both sides of the phase switchs are useable. also I tested it after drive and it doesn,t distort. It the same distortion only louder.

  5. Brother, everything you do has worked excellently, I am very grateful and I congratulate you for everything you do for us, brother I look forward to this project, the Space spiral

  6. FB means ferrite bead? What kind?

    1. I have used a bead like this one for my Spaceman builds.

  7. I have a request, could you create a layout for the multiplex delay jr?

    Thanks from Brazil!!!

  8. I have a question!!
    In aluminum cap, small white section is - or + ??

  9. Thanks for putting these Spaceman Effects veros out. I used to have more time to do them in the past, but tracing for the Dead End FX projects takes up most of my time these days. Cheers!