psu II – 1hp power supply solution

Say hello to eurorack’s tiniest power supply solution available.
psuII is a 1HP switched mode power supply that is designed to power “small” cases.

It’s power inlet is a common type-C USB connector. This allows you to use almost any device to power your rack: powerbanks, laptop chargers, phone chargers, type-C  downstream ports on laptops, and so on. No need for buying an extra wall wart or DC power brick.

It’s generic PCB layout allows it to be mounted as 1HP module, but also to be mounted inside a case, fixed by two M3 screws. There are also landing pads on the PCB that allow you to wire up any other power input connector needed.




128.7mm x 16mm x 5mm (1HP)


  • Standard type C USB connector


  • +12V 700mA and -12V 400mA on pinheaders

—————- Build Instructions —————-

1. solder components in this sequence:

  • Inductors
  • LED’s (see pic for polarity)
  • 3 pin SMD pinheader
  • USB type C connector

>>> test the board by powering it up naked



2. prepare the sheetmetal part

  • bend all the twist lock tabs 90 degree with “flat nose” pliers
    • the picture shows where to hold it so the bend gets right

3. insert and lock the PCB with the sheetmetal part

  • slide the usb connector into its place in the sheetmetal part
    • the bends on the sides must slide into and through their according holes on the pcb
    • the bends on the backside maybe needed to be aligned to all slide in
    • close the twist lock tabs with pliers to secure the PCB (turn them approximately 45-60 degrees, see pic)

—————- BUY —————-

DIY KIT / standalone unit

The DIY KIT includes everything to build an assembled and functional module.


  • lasercut and partially bent stainless steel sheetmetal faceplate and PCB-holder
  • pre-assembled PCB (most passives and the QFN-24 SMPS chip)
  • additional parts to solder: 2 sideview 0805 LED, USB-C connector

intermediate level solder skills are needed for the type-C connector!! (0.5mm pitch)

Assembled module

This is the ready to use psu II. Everything is soldered and mounted.


  • 2 x M3 Inbus Screws
  • 3 x jumpercable to connect to busboards
  • psuII


Not one but two ready to use psu II. Gets you a little discount


  • 4 x M3 Inbus Screws
  • 6 x jumpercable to connect to busboards
  • 2 x psuII

74.– CHF

price includes tracked shipping worldwide

89.– CHF

price includes tracked shipping worldwide

149.– CHF

price includes tracked shipping worldwide