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Contra

Contra is a low cost 40% keyboard.

Keyboard Maintainer: The QMK Community
Hardware Supported: Contra
Hardware Availability: PCB sold by various vendors

Make example for this keyboard (after setting up your build environment):

make contra:default

See the build environment setup and the make instructions for more information. Brand new to QMK? Start with our Complete Newbs Guide.

Bootloader

Enter the bootloader in 3 ways:

Keycode in layout: Press the key mapped to QK_BOOT if it is configured.
Physical reset button: Briefly press the reset button soldered on the PCB.
Bootmagic reset: Hold down the top left key and plug in the controller.