Eurorack Power Bus - 14

Name: Eurorack Power Bus - 14
SKU: 6091
Price: 12.00 USD
Availability: InStock
Rating: 4.75 (11 reviews)

(11 Reviews)

14 x Eurorack Power Connectors in a compact board.

Designed by Electronic things... and stuff in France

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14 x Eurorack Power Connectors in a compact board.

New Ready-made/plug-and-play version available! This version is fully assembled and ready for your case! See below for details Updated to version 1.1 Simpler design and an additional power input conn…

New Ready-made/plug-and-play version available!

This version is fully assembled and ready for your case! See below for details

Updated to version 1.1

Simpler design and an additional power input connector.

Bring Power to your Modules

Every Eurorack Synth needs a power bus. The power bus is the central connection point between the power supply and each module in your case. A good bus is short, able to handle enough power and convenient to use.

Why short? Because the impedance on the ground rail (the 0 Volt reference), needs to be as low as possible. Having short copper tracks reduce that impedance.

With the Eurorack Power Bus, you can connect and power up to 14 Eurorack modules at once!

The DIY/Through-Hole version has in addition two Analogue Systems modules and six 1U tile modules.

Power Supply

The bus needs to be powered:

The Ready-made/Plug-and-play version requires +12V, -12V, 0V and +5V. This version doesn't have a regulator for the +5V. This is the perfect combination with popular PSUs that already output +5V.

The DIY/Through-Hole version requires +12V, -12V, and 0V. The +5V rail can be generated on-board, but only if you install a +5V regulator.

Power enters through Screw Terminals. This kind of connector is versatile and let you connect your bus to any kind of power supply.

There are 3 LEDs to help you visualize if there's energy on the rails, and if the polarities are correct.

The DIY version of the bus is very easy to solder and to build: no SMD, only Through-Hole components. The silkscreen is very detailed and guides you while placing the components.

Want more connectors or smaller footprint?

Other Eurorack Power Bus sizes are available:

More info

The PCB is 20 cm x 5 cm. Easy to integrate within a 84HP row. And if you really, really, need more power connectors (who doesn't?), 2 buses can easily fit in 84HP too. 6 Screws per board and 1.6mm thickness make the PCB really stiff and you can pull and push connectors without worrying to damage the board.

More information on my Blog

Interactive BOM

About connectors

HE-10 Connectors are keyed: no more deadly reverse polarity plugging errors! Even in the dark or deep into your case, don't fear to kill your module by reversing the connector. Don't fear to miss a pair of pins, which generally ends in a nasty firework too.

Always check voltage polarity and module's power connector pinout before plugging anything!

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Electronic things... and stuff Shipping Policy:

I use "La Poste", the French postal service.

Tracking informations on Tracked Shipments are scarce and pretty useless most of the time. For this reason, I recommend the Regular Mail without tracking. Don't waste your money!

If you have any concerns, please contact me.

Quantity	Price
1	$12.00
2+	$9.00

Review Breakdown

Average Ratings

Product: (4.82)

Documentation: (4.73)

Shipping: (4.73)

Communication: (4.73)

Martin | June 21, 2021

Works perfectly

Works beautifully. Not much else to say. Since a review needs to be at least a 100 characters, I’ve added this filler text :-)

Daryll | March 8, 2021

does exactly what is says

I needed a euro power bus for my modular synth , I also have a +-15 volt supply as well , yes a right old mixture , the euro power bus was easy to solder up , good documentation mean the parts were well marked , I didn't need the 5v option , so a quick word with David , he showed me what components to leave out , as the title says , it does exactly what is says , delivering +-12v to my modules , very well made PCB , I look forward to seeing what David comes up with next..

Frederick | March 25, 2020

Best quality for the price. Flexible with many options.

I bought 2 PCBs and received them in Canada after a reasonable 2 weeks (I expected longer since it was in COVID-19 times). The boards are made of top quality, stiff and thick material. All components are clearly marked on the silkscreen, making it a very easy build. I really can't praise enough the Interactive BOM he provides... I really wish I had that for all the other builds I made! It saves so much time.

I installed and connected both boards inside a custom 85HP x 7U case and they fit perfectly. Commercial powered eurorack cases are all too expensive, so this product made me save a lot of money and the result I get makes it as good (if not better) than a commercial solution! I give this product a well deserved 10/10 :)

Paris | Feb. 6, 2020

Excellant Kit and super flexable

I was excited when the kit arrived , well worth every cent , easy to build and customer support was fast for any questions , well done .....
a small documentation would probably solve a lot of questions ,I found some of my answers in the product description during the build. How ever the build is very straight forward plus I would not hesitate to buy more kits from Tindie.
Thank you for a fine , high quality kit

Patryk | Oct. 30, 2019

Great Deal

Thank you for this PCB. Great and clear product. Good shipping, coming fast.
Thank you for you write notes inside :)
Fully recommended Seller, here can i buy it next time.

Cheers

Costantino | July 17, 2019

The heart of my new DIY modular synth

I started building my own DIY modular synth and I used this power bus board to supply my module.
Really a great project!!! Easy to build and well documented!

Georgi | May 17, 2019

Great quality and attention to detail.

Arrived on time and even had Thank you post-it handwritten message form the seller inside! The board is very good start for building your own DIY eurorack synth. Recommended!

Response from Electronic things... and stuff | May 17, 2019

Martin | Jan. 6, 2019

Great PCBs!

This PCB is the most versatile on the Net. The build quality is great and you get a perfect product for suppliyng your Eurorack system.

Thanks for the fast shipping and the great PCB!

Martin

Response from Electronic things... and stuff | Jan. 6, 2019

Thank you so much Martin for your kind words!

Alyn | April 4, 2018

Great power bus for a smaller system, quick to build.

I'm a new Eurorackist and am using this in a home-built 84HP Eurorack skiff. Fourteen Doepfer connections is probably overkill (edit in September: No, I've filled them all!), but I wanted the additional 1U-type connectors. I've not populated the Analogue Systems connections, as I don't have any modules requiring them. Only thing that would make this better is resettable fuses in the bus somewhere - there's no help if you start drawing more power than the board can handle. I'm doing both modules and cables DIY, so it _should't_ happen, but I'm still concerned.

Response from Electronic things... and stuff | Jan. 6, 2019

Hi Alyn!
Yes, the power connectors are filled pretty quickly in a modular system! There's never enough modules and never enough power connectors!

On the lack of resettable fuses, I totally understand your concerns.
The power bus board itself doesn't require a fuse. It can handle a lot of current and your PSU must have a fuse anyway. In case of a short circuit (several amps), it's the PSU fuse who blows.

A faulty module shouldn't damage the orther modules.
The only advantage of having fuses on the bus board is to separate the faulty circuit and to prevent the whole system to stop functionning.
However, it's complicated to design such protection: What's a faulty module? How much current a module is reasonably supposed to draw to stay safe?
For example, a VCO draws around a couple tens of miliamps while some big multifunction modules with LEDs and µC or a tube VCA draw hundreds of mA. Maybe more.
So, placing, say, a 200mA fuse on each connector would prevent some modules to function properly and maybe wouldn't be enough to prevent damaging a faulty module.

Besides, the worst thing a module can experience is having a reversed power input. (Wrong cable, misconntected connector, badly powered bus...)
The best way to keep everything safe is having some protection diodes or Mosfets on each module power input.

Tom | Feb. 2, 2017

Nice and straightforward power bus

I bought two of these PCBs to go in my synthesizer, and bought the parts separately to build them up.

All went together very smoothly. I'm not using the 5V converter - I've already got 5V coming from my power supply - so am just using them for power distribution, for which they work really well. I particularly like the tile-tail connectors for my 1U tile row. My only complaint would be that the tile tail connectors are a tad close - they're spaced as 0.1" pin headers, and they perhaps could be a bit wider. But they work, and I get a decent row of modules and tiles off a single PCB.

Shipping was swift and packaging very good indeed.

Karl | Nov. 5, 2016

Great Eurorack bus kit at an awesome price

The kit came with all the required pieces and included a high quality PCB. It was easy to put together and powered up with no problems the first time. An additional perk is that you only need to supply the +/- 12v and it takes care of the 5v bus.

Shipping was pretty quick, especially considering it came from France to Texas :-)

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