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Contra

Extremely low cost ortholinear keyboard

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The bare minimum for a functional keyboard.

In light of recent claims that I am 100% liable for any of my open source PCBs, I am adding this disclaimer.

I provide these PCBs as a reference for designing keyboard PCBs. Using them within your projects will require a will to do research of one's own and to learn the workings of them, potentially fixing issues if they exist.

I provide these PCBs without liability and without any guarantees regarding functionality, as expressed in the MIT license under which all of these PCBs are licensed.

Features

  • 2U or split space.
  • All through-hole parts. 48x diodes, 1x Pro Micro.
  • Assembled by M2 standoffs and screws.
  • Programmable via firmware of choice, such as TMK.
  • Nothing fancy. A very nice way to try out some switches, enjoy some DIY, or to test out ortho keyboards.

Parts list

  • 48x 1N4148 diodes or similar, THT
  • 1x Pro Micro
  • 48x Switches
  • Optional 1x 2U stabilizer, PCB mount
  • One PCB, one plate, and one bottom plate
  • 5 M2 8mm standoffs
  • 10 M2 screws

Files for production

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Contra - Lowest cost ortholinear keyboard kit possible

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