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Contra

by ai03-2725 · ·

48 keys unibody

MX Pro Micro socket ZMK

3D render of the Contra circuit board
The bare PCB, drawn from Contra.kicad_pcb. No switches or keycaps: this is the board as manufactured.

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Record 100% complete · 16 of 16 fields

Extremely low cost ortholinear keyboard

Layouts

Spec

Shape

Body
unibody
Splay
no
Stagger
ortholinear
Key spacing
MX spacing · 19.05 × 19.05 mm

Switches

Switch footprint
MX
Hotswap
Mill-Max, or solder the switches in

Electronics

Controller
Pro Micro socket
Connectivity
Wireless with a nice!nano v2, or 6 other controllers
USB port
USB-C or micro-USB, depends on the dev board
Firmware
ZMK (contra)
Firmware targets
— not recorded —
Key wiring
4×12 matrix, column-to-row diodes
Room for
— not recorded —
Power switch
no
Exposed components
no

Building it

Build method
PCB
Soldering
through-hole (diode)
SMD required
no

Licensing

Hardware
all rights reserved — no license stated
Firmware
all rights reserved — no license stated
Documentation
all rights reserved — no license stated

Sources