Open-source electric unicycle · 2022 – present · Hardware + firmware, fully open.
An electric unicycle (EUC) built to be trusted and repaired: waterproof, crash-resistant, and designed so that losing power is treated as a fatal design error, not the rider's fault. Hardware and firmware are open so the community can repair and modify them, free of the proprietary restrictions that lock down commercial wheels.
Documentation Pitch Video Source
Why it exists
Commercial EUCs are powerful but fragile: proprietary hardware and firmware block repairs, rain alone can kill them, they overheat with no sensors to catch it, and battery fires are a real risk. Worst of all, a power cutout at speed throws the rider — and it's usually blamed on the rider rather than the design.
Cyberwheel's core rule: a well-designed EUC should never cut power, even if you try. That means margin on both sides — undervoltage and overvoltage — using ideas like resistor or motor-coil short-circuit braking instead of dumping charge into an already-full battery.
Design highlights
- Sealed electronics and battery compartment — waterproof enough to survive rain, puddles, and worse.
- Chassis as heatsink — aluminium structure doubles as thermal mass so the electronics don't overheat under load.
- Multifunction handle — kickstand, lock-to-a-pole arm, and seat in one folding part.
- Built-in charger and a fireproof battery cover.
- Repairable by design — modular assembly, open hardware and firmware.
Target parameters
~50 km/h · 80 kg rider · 16″ or 18″ wheel · 20s 84 V pack · hollow-bore high-torque motor (C38 / C30 class) · hill-climbing, no suspension.
Full build docs, requirements, and battery work: rubenayla.github.io/cyberwheel