mafik's Keyer

Firmware and build instructions for a one-handed chorded keyboard.

Unclaimed

31 ratings3.57

Saves411

CategoryUtilities

PlatformWeb

PricingFree

A DIY firmware and hardware project for creating a one-handed chorded keyboard (Keyer) that offers ergonomic typing with minimal finger movement. It includes firmware, layout optimizers, and detailed instructions to build and customize a custom ergonomic mechanical keyboard using common parts and modeling clay.

open-source

Ratings & Reviews

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3.57

31 reviews

Product

3.57

Design & Polish

3.07

Performance

4.07

Anonymous reviewer

9/14/2026

A wire skeleton, ten switches, and baked clay make this feel shaped to one hand instead of assembled from a kit. The layout optimizer and tutor matter just as much here. For a chorded keyboard, the key map has to match what you actually type.