Eurorack Power Bus - 14

A power distribution board for Eurorack modular synthesizers. 14 keyed 16-pin IDC connectors, two screw terminal inputs, three status LEDs. PCB size: 20 × 5 cm. Fits a standard 84HP row.

What it does

Distributes +12V, −12V, and +5V from your PSU to up to 14 modules simultaneously. Power enters via screw terminals, compatible with any supply that exposes its rails through a terminal block. Two inputs are available, on opposite edges of the board, so you can cable from the top or the bottom of your case and daisy-chain a second bus if needed.

The 16-pin IDC connectors are keyed: a reversed ribbon cable physically cannot plug in. No reverse polarity risk.

Three LEDs indicate whether each rail is live and correctly polarised. Useful during initial setup and when troubleshooting.

Two versions

Ready-made: SMD assembly, fully assembled and tested, ships ready to install. Requires a PSU with a +5V output.

DIY kit: through-hole only, no SMD. The silkscreen labels every component. An interactive BOM is available online to guide the build. The +5V rail can be generated on-board by adding an optional 7805 linear regulator. Useful if your PSU only outputs ±12V.

The DIY version also includes:

• 2 × 16-pin IDC DIL connectors for Analogue Systems compatible modules
• 6 × 3-pin connectors for powered 1U Pulplogic-format tile modules

Mechanical

• PCB: 20 × 5 cm, 1.6 mm thick
• 6 mounting holes
• Fits within 84HP; two boards side by side still fit in 84HP

The short copper tracks between connectors keep ground rail impedance low: relevant under high current draw.

Part of a range

Other sizes are available in the same range: 10, 18, 26, and 28 connectors. Same layout logic, different connector count.

Orders are usually shipped within the week following purchase.

Smaller items (PCBs, assembled PCBs, and small kits) are sent in letter format (padded envelope), while larger items are sent as parcels.

Shipments within France and the EU are only tracked when sent as parcels.

Shipping to the rest of the world is available. Please contact me if you have any questions or concerns.