wearpants/jazzhands-hardware

Jazz Hands PCBs

A small multi-PCB handheld keyboard for chording style input.

Main

The main "brains" PCB, which accepts a nice!nano controller. It exposes connection points with Molex Pico EZMate connectors for 5 key PCBs, and a 3-pin Molex Pico EZMate connector for use with the power-reset daughterboard PCB. An untested IMU is also on the main PCB, for future use.

Key

A small single key PCB with Molex Pico EZMate connector, Kailh hotswap socket, and mounting holes for possible assembly. One mounting hole "wing" is breakaway, as needed.

Power/Reset

A small daughterboard PCB that contains a reset button and power switch, allowing those two components to be placed elsewhere in a case

Firmware

See the wearpants/jazzhands-zmk-config repo for firmware for the main PCB with ZMK.

Custom Modifications

It's possible to hack the current main PCB to also support a digital hall-effect sensor like the DRV5023 for use in a handheld "switchless design" using magnets only for activation in a glove.

Production

All three PCBs can be produced by grabbing the generated files from the Actions tab and uploading to JLC, including partial assembly for the main PCB using JLC's PCBA service.