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.

The PBJ EU in use with an Arduino


  • 4 channel 3.5mm jack access
  • LED monitors for each channel. Red indicates positive voltage present. Blue indicates negative.
  • Test point per channel gives convenient access for scope/meter probes.
  • 2 Large Ground connection points are excellent for attaching alligator leads
  • 2 MULT switches connect channel 1 to 2 or channel 3 to 4. Just a little nicety because you can never have too many mults.
  • Tip and Switch signals are routed from the jacks to the wiring connector J9.
  • +/- 12V and +5V power are also routed to the wiring connector J9.
  • Power is switched for convenience.
  • Power indicator shows presence of +5V at the wiring connector J9.
  • 10 pin EU power output connector is provided for convenience.
  • All inputs to the monitor circuitry are protected
  • 22 HP wide

You can build one for less than $60

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