An ergonomic keyboard heavily inspired by the Atreus, Iris and Atreis keyboards.
The name Pteron is the Ancient greek word for wing (and feather). This was inspired by Chiroptera, the scientific name (or order) of bats.
The name “Chiroptera” derives from Ancient Greek: χείρ – cheir, “hand” and πτερόν – pteron, “wing”. https://en.wikipedia.org/wiki/Bat#Etymology
Check the builds folder for more photos. The 56-key version shown in the photo above is built using 9 mm brass spacers. It can theoretically be built using spacers as small as 5 mm, but that requires very strict cable management.
- PCB and acrylic case for the 56-key Pteron: https://github.com/kraken-jokes/pteron-pcb
- 36-key split version with PCB and acrylic case designs: https://github.com/harshitgoel96/pteron36-split-keyboard
The default switch plate is designed for laser cutting with a kerf of 0.1 mm. The switch holes are designed for Cherry MX style switches, and should allow for switch top removal on both Cherry MX/Gateron/etc. and Kailh BOX switches.
There is an alternative switch plate with square holes (case/switch-plate-square-holes.svg), which does not allow switch top opening, but which might add some stability to the switches.
I would recommend using 3 mm thick acrylic for stiffness, which means that the switches have to be glued in, since Cherry MX-style switches are designed for a plate thickness of ~1.5 mm.
The .svg-files can be converted to dxf by first saving as .eps (via for example Inkscape) and then using the following pstoedit command
pstoedit -f "dxf_s: -mm -splineasbezier" infile.eps outfile.dxf
Firmware is available here: https://github.com/qmk/qmk_firmware/tree/master/keyboards/handwired/pteron
The initial inspiration was the Atreis keyboard, but I wanted some more stagger on the ring and pinky fingers. I ended up with a stagger of -0.7 u for the two outer columns, followed by -0.2 u, 0, -0.3 u and -0.4 u. I also removed the top thumb key, and added a key to the thumb cluster.
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This means you can run Group Buys of these designs, as long as you credit where the design came from (this repo).