Berlin was in the grip of a record-breaking heat wave, but inside the brutalist concrete halls of Technische Universität Berlin, several hundred hardware hackers barely noticed. They were too busy passing around conductive-thread breadboards, comparing laser-cut LED earrings, and queuing for a workshop where butterfly-shaped PCBs blink colours at each other over infrared. This was the Open Hardware Summit 2026 — OSHWA’s annual gathering of the global open source hardware community.
What the community brought to Berlin
The single-track talk day meant nobody had to choose between sessions, and the lineup ranged from the practical to the visionary. The Flow Battery Research Collective showed how home-fabricated, sustainable flow batteries might one day be as shareable as a 3D print file. Another talk traced open hardware’s roots back to the knitting machine community, where hobbyists have spent decades reverse-engineering abandoned commercial machines — a story now being turned into a feature film. A standout session, “50,000 Devices Later,” argued that giving away your designs isn’t commercial suicide — openness can cut costs and multiply real-world impact.
How the hands-on day worked
Sunday flipped the format to six parallel workshop tracks. The highlight for microcontroller fans: a CircuitPython workshop built around a custom butterfly-shaped wearable PCB, ending with a swarm of boards “transmitting” colours to one another over infrared — and the whole thing is on GitHub, so you can rebuild it at home with any CircuitPython-capable board. On the exhibit floor, Seeed Studio showed off its expanding XIAO ecosystem, including XIAO-powered smart glasses, while Threadboards recreated a breadboard‘s rows and columns entirely in wool and conductive thread, proving that prototyping tools don’t have to be made of plastic.
The takeaway
The Summit’s real lesson isn’t any single project — it’s that publishing your schematics, firmware, and mistakes makes the whole community move faster. Every talk from this year is already on OHS’s YouTube channel, and the #OHS2026 hashtag is full of attendee photos (moth-costume rave included). If a trip to 2027’s edition feels far off, start smaller: pick one open project from the Summit, clone the repo, and build it on your own bench. That’s exactly how most of this year’s speakers got started.
Frequently Asked Questions
Where was the Open Hardware Summit 2026 held?
At Technische Universität Berlin in Germany, with a single-track day of talks followed by a full day of hands-on workshops across six parallel tracks.
Can I watch the Summit talks if I didn’t attend?
Yes — every talk is published on the Open Hardware Summit YouTube channel, and projects like the butterfly wearable workshop have complete GitHub repos so you can rebuild them at home.
What will I learn if I build one of the Summit’s open projects?
Cloning something like the butterfly wearable teaches CircuitPython programming, custom PCB design, infrared communication between boards, and how to read and contribute to open hardware repositories — core skills for any electronics portfolio.
