Eurorack Power Bus – 18 Connectors

The Bus number 18 is there!

It’s a modified version of the classic Eurorack Power Bus.
This power distribution board for Eurorack synths will easily power up to 18 modules. With on-board generated +5V rail (using the +12 V rail).
Place the Bus Board in the back of your Eurorack Skiff or your monster case and plug in it your modules.

The bus is 20 cm long, 5 cm wide (7.87″ x 1.97″).

There are 3 LEDs for visualizing the 3 Voltage Rails. This LEDs shows you if there’s energy on the rails, and if the polarities are correct.

Input is done through a Screw Terminal connector.

Screw Terminals are very versatile. You can connect easily to the Bus Board any Power Supply. You can replace it by any 5.08 mm pin pitch connector.
There’s one connector on top and one on bottom side of the bus.

HE-10 Connectors are keyed: they decrease the risk to connect the modules in wrong polarity.
But, you absolutely need to check your wiring twice before powering the bus!

Read the modules’ manual and documentations. Check the cable. Check again.
Check Again!

Build your bus

As always, start by soldering the smaller parts (resistors and diodes, then the regulator).
Then progressively solder the bigger and taller ones.
Using that method, it’s easier to solder the components flush to the PCB. Simply place the components on the PCB, flip it over and let it rest on your workbench and then solder only one pin per component. Flip it back, check twice that the orientation and the alignment are correct. If so, solder the remaining pins.

Diodes and LEDs are polarized. The square pad is the Cathode.

Diodes are polarized. The white band is the Cathode.

LEDs are polarized. The truncated side is the Cathode and the longest pin is the Anode.

Documentation

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