Fourier - Split 40% Keybaord

thingiverse

Fourier is a 40% split keyboard featuring two halves connected via TRRS cable. Features: - 4.75mm integrated switch plate with accommodations that allow switches to snap into place - 6-degree incline for ergonomic typing - High profile sides for added stability - Snap-fit design allows for easy assembly Parts: - Fourier PCB: open source design files available on GitHub (https://github.com/keebio/fourier) - 2x Pro Micro: Arduino-compatible microcontrollers with 5V and 16MHz operation (https://keeb.io/collections/frontpage/products/pro-micro-5v-16mhz-arduino-compatible-atmega32u4) - TRRS Cable: high-quality cable for connecting keyboard halves (https://keeb.io/collections/frontpage/products/trrs-cable?variant=8139444519018) - Brass heat-set inserts: 94180A312 (https://www.mcmaster.com/catalog/124/3395) - M2 Screws: precision screws for assembling the keyboard (https://www.mcmaster.com/92010a001) - Rubber bumpon pads: non-slip feet for added stability - Optional: powerful 8mm x 3mm magnets (8 total) for secure assembly PCB Build Guide: detailed instructions available on Imgur (https://imgur.com/a/wl0fS) Printing: STL models are oriented for proper printing, with both top and base printed with supports, including bridges. The top parts have cavities that provide space for magnets to be inserted mid-print at a z-height of 10-10.2mm. Assembly: Use your soldering iron to slowly insert the brass heat-sets, slightly in-set. If a ring of plastic wells up around the inserts on the perimeter, make sure to trim them flush to avoid gaps between the top and bottom parts. Do not over tighten the screws; just enough to keep the top and base together securely. When soldering both sides of the Pro Micros, keep solder joint height to a minimum. It is necessary to trim the header pins and solder joints as low as possible with flush cutters. Optionally, the PCB supports RGB strips, which provide a nice effect if you print the base in clear filament.