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 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.
  • Tip and Switch signals are routed from the jacks to the wiring connector.
  • +/- 12V and adjustable +5V and 3.3V power rails are routed to the wiring connector.
  • LED monitors for each jack. Red indicates positive voltage present. Blue indicates negative.
  • Test point per jack gives convenient access for scope/meter probes and injecting signals.
  • 2 Large Ground connection points are excellent for attaching alligator clips.
  • 3 MULT switches connect jack 1 to 2, jack 2 to 3 or jack 3 to 4.
  • Power is switched.
  • Power indicators show the status of all power rails.
  • 10 pin EU power output connector can be used to power off-rack modules.
  • 22 HP wide.
  • Ready when you are. Everything you need with no pre-setup required!

Buy the Circuit Board (US and CA only)

Price: $10

Buy the Assembled Module (US and CA only)

Price: $129

Get The Design Files

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License Info

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