Proto Board with Jacks

The PBJ EU in use with an Arduino

With 4 switched jacks and 800 solderless tie points, the PBJ EU is made to be installed in a Eurorack system. It is connected to power via the standard 16 pin ribbon cable that is common to Eurorack systems. The PBJ EU makes a great platform for developing Eurorack synthesizer circuitry. And because it is installed in the rack, it will be much easier to transport for show and tell or performances.


  • 800 point solderless proto board
  • 4 switched 3.5mm jacks
  • Wiring connector interfaces jacks and power to proto board
  • LED monitors for each jack. Red indicates positive voltage present. Blue indicates negative.
  • Test point per jack gives convenient access for scope/meter probes.
  • 2 Large Ground connection points are excellent for attaching alligator clips
  • 2 MULT switches connect jack 1 to 2 or jack 3 to 4.
  • Tip and Switch signals are routed from the jacks to the wiring connector.
  • +/- 12V and +5V power are routed to the wiring connector.
  • Power is switched.
  • Power indicator shows presence of +5V.
  • 10 pin EU power output connector can be used to power off-rack modules.
  • 22 HP wide

Buy the Circuit Board (US and CA only)

Price: $10

Buy the Assembled Module (US and CA only)

Price: $100

Get The Design Files

Click Here

License Info

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 Generic License.