Eurorack Switched Mode Power Supply (SMPS)

The Eurorack SMPS is the most powerful power supply I designed.

It’s also a very simple and safe solution: Linear power supplies usually need a transformer, which implies to deal with Mains voltages (the exception is the Mini Dual Power Supply which just requires a Wall Wart).

The Eurorack SMPS instead is powered by a regular laptop-style power supply.

Eurorack SMPS Top side PCB
Bottom side PCB


The build process is pretty straight forward. The two DC-DC converters hosts the complex circuitry.
I recommend to start by soldering the two converters, and then to solder the diodes. Attention, D1 is not a regular Silicon Diode. It’s a TVS (Transient-Voltage-Suppression) diode (P6KE 39A). See Datasheet.

Interactive BOM (euro_sps-1.1-ibom-2019-11-13 21-06-07.html)

3 thoughts on “Eurorack Switched Mode Power Supply (SMPS)

  1. Hi David! Beautiful, beautiful design!

    I just have one question — do you have a BOM anywhere for this device?

    I ordered one of your board/panel sets from Tindie for this PSU and I’m struggling to find the part values for some of the smaller components.

    I can’t wait for the boards to arrive so I can start assembling this though. It looks absolutely brilliant. Thanks for sharing your work!

    1. Hey! Thank you very much 🙂
      You’re right, I completely forgot to add some BOM information. So, I just uploaded the interactive BOM and I’ll add later more information.
      If you can’t find a specific component, let me know.
      Best wishes

      1. Thank you so much David! I just got the boards (your PSU and the SLMS) in the mail yesterday and I have to say the designs are *gorgeous*. I can’t wait to put them together. Thanks for the prompt reply, the nice note on the package, and the BOM upload! I’ll let you know how it all works once I’ve got it in my little test skiff. ^^
        All the best from sunny Seattle!


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