Ouroboros Loop Station

Projects and Examples
1

Introducing Ouroboros Loop Station

Open Source DIY Project. 5-Track Looper based on Daisy Seed.

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Firmware complete, schematic ready, PCB coming soon. GitHub Repository

Core Principles

  • Zero Menu Diving. Every function accessible via direct hardware control
  • Simplicity. Do not overloaded by unnecessary features
  • DIY Friendly: Through-hole components only, open-source design

Key Features

  • 5 Independent Stereo Layers: 30 seconds each at 48kHz

Input

Hardware relay switching between input types:

  • Guitar (Hi-Z)
  • Microphone (preamp)
  • Stereo Line
  • Eurorack Input (WIP)

Controls

  • Volume: Individual + master
  • Speed: 0.3× to 2.0× per track (hold layer button + turn speed knob)
  • Pan: Real-time stereo positioning per track (hold layer button + turn speed knob)

Current Status

:white_check_mark: Firmware: Complete and tested
:white_check_mark: Schematic: Ready and tested
:construction: PCB: Work in progress - delivery soon!
:clipboard: BOM: Coming with PCB release

Why Open Source?

The DIY audio community thrives on shared knowledge and collaboration. By open-sourcing Ouroboros, I hope to:

  • Inspire new features: Community contributions and modifications
  • Build together: Foster innovation in the DIY music tech space

Get Involved

:link: GitHub: https://github.com/kooliha/Ouroboros_Loop_Station
:open_book: Documentation: Coming soon
:speech_balloon: Feedback: Looking for testers and contributors!

Questions? Ideas? Want to collaborate? Drop a comment below or check out the GitHub repo. This project represents what the Daisy community can achieve when we combine creativity with solid engineering principles.

Let’s make some music! :musical_note:

P.S. - Special thanks to the Electrosmith team for creating such an incredible platform. The Daisy Seed’s capabilities continue to amaze me every day.

3 Likes
2

Hey @Alex_Kulinchenko!!

This sounds like a fun project!! Multi-input support (guitar, mic, and line) is great :slight_smile:
Definitely keep us posted as the hardware is coming together!

Thank you so much for sharing and also for making the project open source.

3

Hi Everyone,

Code is ready, prototype works well, time for PCB.

I’m at a crossroads now: should I go SMD or through-hole for the main components?

If SMD – what sizes would you feel comfortable soldering? (e.g., 0603, 0805, 1206)
If through-hole – any preferred part sizes or spacing for ease of assembly?

I’d love to hear what would make you most likely to actually build it once the PCB and code are ready.
Your feedback will help shape the design so it’s accessible and fun for as many people as possible.

Thanks!

4

I think for this project through-hole may be the way to go! The general consensus from what I can see is that it’s easier to solder.

1 Like
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Just a quick update! I’ve finally finished the PCB. Decided to go with SMD 0805 – it’s easy to order for auto-assembly or to hand solder, whichever you prefer. I’m going to order a few boards to test, and once I’ve verified everything I’ll share the design here for everyone to use.

2 Likes
6

I’ve assembled the first version - and it works. It’s a great feeling when something you’ve poured hours into comes to life without major rework. Sharing the joy with you all.

It’s free to use. If you build one and fancy buying me a pint, you can do so here:

https://ko-fi.com/alex_kulinchenko

Added to git:

  • Schematic

  • Firmware

  • BOM XLS

  • BOM Mouser (part of the through hole components you will have to buy elsewere)

  • PCB (tested, working)

  • PCB Front Panel

  • 3D-printable enclosure

I would add links here but by the rules of the forum I can not post more than 2 links. Please use link to the Git from the first post

Release notes v1.1 (important)

  • IDC 16-pin ribbon. I planned to use a standard IDC ribbon to simplify assembly, but I mistakenly used a 1.27 mm pitch instead of 2.54 mm. You’ll either need a matching cable or to hand-wire the connection.

  • The output is stereo. Always use a stereo (TRS) jack — a mono plug will short one side of the op-amp. I’ve added protection, but it’s still best to use TRS.

  • Analogue and digital grounds are separated and tied at a single point. You must bridge them under the Daisy Seed before power-up. I left this open for easier debugging.

  • This PCB does not fit standard Hammond aluminium boxes as-is. Potentially, you can abandon PCB for a socket and fit it with just wires. A 3D-printable enclosure is included.

v1.2 (not tested)

I’ve reworked the socket I/O board and corrected the IDC footprint. It should fit a larger Hammond enclosure. If anyone is willing to test the new PCB, you’re very welcome.

  • V1.2 files: [links]

  • Notes:

    • Socket / I-O board fully redesigned (new layout, different switch/jack footprints).

    • IDC 16-pin footprint corrected; please confirm the pitch before fabrication.

When time allows (between work and family), I plan to design a single-board version combining the Daisy and I/O section, properly sized for a Hammond enclosure.

Feel free to ask questions – always happy to help.

7

PS it’s really difficult to buy Daisy Seed in the UK. Most local or EU resellers are out of stock, and importing directly from the US doubles the cost once postage and VAT are added.

Electrosmith team, are there any plans to expand distribution in the UK or EU? It would make the platform much more accessible and affordable for independent makers and DIY projects here.

Thanks again for the great work you’re doing - the Daisy ecosystem is truly inspiring.

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Yes, we are currently in the process of launching fulfillment centers in Czechia and England.

These have been delayed since our initial announcement, BUT we are expecting to launch in March of 2026.

Once these go live, customers in the UK and EU will be able to check out on our site in their native currency with VAT inclusive pricing and affordable freight options.