The Bus number 18 is there!
Continue reading Eurorack Power Bus – 18 Connectors
Category Archives: Eurorack Power Buses
Eurorack Power Bus – 26 Connectors
This is the Eurorack Power Bus on steroids: 26 connectors on a 25cm x 5cm board!
Continue reading Eurorack Power Bus – 26 Connectors
Eurorack Power Bus – Update 1.1
The Eurorack Power Bus with its 14 Euro connectors is back in an updated version.
Continue reading Eurorack Power Bus – Update 1.1
Eurorack Compact Power Bus – version 1.1b B(L)ACK in stock

New revision for the Eurorack Compact Power Bus!
The Compact bus is one of the smallest yet powerful Euro bus in the world. Yes really 🙂 It’s only 10cm long but you can plug 8 modules plus 4 tiles and one Analogue Systems module!
Construction details
The board is really easy to solder. There are, on the bottom side of the board, 3 SMT resistors and 3 SMT capacitors. But don’t be afraid, those are 1206!
1206 SMT devices are big enough to be soldered with standard through-hole equipment. I personally use a cheap soldering iron.
What makes the difference is the thickness of your solder. I recommend 0.5mm solder wire. 0.3mm is better, but consider it only if you plan to do a lot of SMT soldering in the future.
Besides, it can be a great opportunity to experiment your first SMT soldering job. And don’t worry, if you aren’t successful, well, your board will still be fully functional! Only the LEDs might be inoperative.
Step by step assembly
Start by soldering the 6 SMT devices. Apply a small amount of solder on one pad of each component. with fine tweezers, place your component in its designated location, then reflow the solder with your iron while you slightly adjust the alignment of the component over the pads.
If you’re satisfied with the position, you just have to solder the second pad, and voilà!
If you do own an Analogue Systems module, you can solder the 16-pin DIP connector now. If you don’t have such module, skip this step.
Solder the 8 Eurorack connectors. I recommend boxed headers but some will prefer the unboxed ones. It’s your call! Eurorack Connectors are 2×8 pins, 2.54mm pitch.
Next, you can solder the four 3-pin “1U Tiles” connectors. Again, if you don’t use 1U Tiles, then simply skip this step.
I recommend to solder the LEDs now, before the big power input connector. If you flip your board, it will sit flat on your desk. It should be easier to align the LEDs vertically.
Last step is the power input connector. You can use different solutions but the one I use and recommend is the Screw Terminal Block. It allows you to accommodate a lot of different power sources. The pin pitch is 5.08mm.
Power on
The board requires 4 power rails: +12, -12, +5 and 0V (0V is marked “GND” on the board). The +5V rail can be skipped if your modules don’t require it.
If you have some doubts about the difference between the -12V and the 0V, please read my previous post “Ground is Not your Negative Rail“.
When powered on, the LEDs should lit. If not, double check your solders and most important, check the polarities of both LEDs and your rails.
Documentation
How to Hand Solder SMD
Hand soldering Surface Mount Devices (SMD) scares a lot of DIYers and Makers, but it is easier than what it looks like. Even sometimes, it’s easier than soldering Through Hole Components. Really!
Continue reading How to Hand Solder SMD
Compact Eurorack Power Bus Version 1.1
It is time for an update of the Compact Eurorack Power Bus! This is version 1.1!
How to link 16 pin Eurorack Power Connector to 10 pin Connector

Usually, the pin #1 of a ribbon is colored in red or blue. Never trust the ribbon cable color! And never trust a cable.
Always check twice the correct polarity and voltage before pluging your module!
Eurorack Power Connectors and Ribbon cables
Connecting your module for the first time can be tricky. There are chances to destroy it.
Ok, what to do then? Well, you need to check the following points before pluging in anything, and most important : Never trust the red stripe.
Continue reading Eurorack Power Connectors and Ribbon cables
Compact Eurorack Power Bus – Updates
Updated BOM and documentation available:
Compact Euro Bus 16 – BOM & doc 20160229
New Context Wiring diagram:
Eurorack Power Bus – 14 Connectors
After my first Compact Power Bus, I decided to go bigger and I designed a 14 connector Eurorack Power Bus.
Continue reading Eurorack Power Bus – 14 Connectors