This is a functional prototype built from 8 rescued fidget spinners. Quirky, imperfect, but absolutely one of a kind.

👉 You can see it in action in the video (demo starts at 13:10 for MIDI and 15:38 for features).

The main mode is an arpeggiator, with adjustable:

Tempo (60–180 BPM)
Division (1/4, 1/8, 1/16, 1/32)
Pitch & Scale (Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, Locrian)

Sound sources: SINE, TRIANGLE, SAW, SQUARE, BAMBOO sample
Built-in effects: Filter, Warp, Tremolo, Glitch
Includes full source code so you can modify it yourself.

Connectivity: headphone output, built-in speaker with amplifier, works with a power bank.

Important to know

Limited edition: only 5 units ever built, each one signed by me.
This is not a polished product, but an experimental art piece.
The IR sensors are disrupted by infrared and sunlight. Normal daylight usually works fine, but on sunny days (even indoors) the instrument will not function properly.
The amplifier crackles and the volume knob can only be opened partway – otherwise the synth restarts.

General Disclaimer

All items sold through Strange Inventions Lab are hand-built experimental creations. They are sold as-is, without certification, warranty, or guarantee of safety for long-term or unsupervised use.

Not intended for children.
Use only under supervision.
May contain repurposed or off-the-shelf components.
Risk of overheating, malfunction, or damage if misused.

By purchasing, you accept that these products are art pieces / prototypes, not mass-produced consumer electronics.

Limited Edition Creations

Fidget Spinner Synthesizer – Limited Edition