I started to build my DIY modular synth from this amazing project. It was a great experience: it is a really simple starting point to learn how to build a module, even if I have to admit that I have a quite long soldering practice. I have also made my own front panel with a laser cutter and a wood panel. The sound is great!!! I really like this LFO. The only limitation is that the frequency can be changed only by hand with the knob: no external CV modulation. I really suggest this module if you want to learn how to create your own synth.
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.
This Eurorack proto-board is perfectly sized for quick module builds and development. I have hand-built almost all of my modules (except for one -- couldn't live without a DSI Curtis Filter...) and this PCB is by far the quickest and most straightforward platform for building modules that I've encountered, the design is very good, with three rails accessible for op amps / etc, places for power-protection diodes and a keyed header, and the mounting holes are well positioned and well sized.
Shipping (I am in US) was quick and package arrived in good shape.
I use #6-32 screws for my builds and have to widen the holes slightly but there is more than adequate room around them with no copper so you can do this.
The layout is essentially similar to standard "breadboards" which makes transferring a breadboarded circuit to PCB very easy. This is a far better and more useful layout than even the classic Adafruit perma-proto boards.
What else is great? If you use through-hole pots, jacks etc this is absolutely PERFECT and you can create very slim builds. You can easily access and use the 5V power rail if that's your preference, and although there isn't a separate power bus for this I have not found it inconvenient.
I honestly plan to use these PCBs for any/all my future builds, even ones of higher complexity can simply utilize them stacked or side by side.
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.
Using it for building eurorack/frakrak style Arduino-based synth modules. Lends itself nicely to mounting 9mm or other size pots and 3.5 mm jacks along the edge so the boards mount easily to a panel. The prototyping area is excellent for using the smaller breadboard-friendly Arduino Mini/Micro/Nano and Teensy boards for creating flexible and programmable synthesizer modules. Originally bought two with no immediate usage in mind, then decided to try using them for the current purpose. Worked so well and liked it so much I bought half a dozen more. And will probably get more when those are all used. Highly recommended.