_MG_7382_thumbThat feeling when you want to add a bunch of 5V modules to your modular, but you’ve only got 12V power rails… solved!

This easy-peasy DIY build will quickly and easily add a 5V rail to your Eurorack power bus. With the same footprint and 4-pin edge connectors as our MiniBus power distro board, you can build a neat and scalable solution to your 5V power needs in no time at all.

Power is drawn from your existing +12V rail. The 5V regulator is good for up to 1A of current (assuming that your 12V supply can deliver it, of course).

To use, simply connect your existing power supply to the 10-pin input. The five 16-pin outputs can be used immediately, and you can extend the number of outputs by connecting to a MiniBus board via one of the 16-pin headers or one of the four 4-pin edge connectors.

Specifically targeted at entry-level DIY-ers, this project boasts

  • Low part count
  • Clear, simple instructions
  • Complete parts kits, with all parts clearly identified
  • Low tool requirements


Build options & instructions

The ThirdRail build instructions provide a clear guide to making this project.


The full parts list can be found in the build instructions. All of the parts used in this project are easily and widely obtained from any electronics supplier.

Our parts kits contain all of the electronic parts that you’ll need to do the job; the only things that we don’t supply are:

  • Tools
  • Solder
  • Connecting cables


Item Price

PCB only


Full kit

A PCB and all of the additional parts you need to build this project.


Prices include packing & standard (untracked) shipping. All prices are given in GBP, your local price after currency conversion may vary.

All of our products are available from our Etsy shop. Although we make efforts to keep our stock levels as constant as possible, demand might occasionally mean that an item is out of stock. Stock replenishment typically takes less than one week.