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KF87 Hotswap — KawaiiVoldemort x FJLaboratories

Replacement PCBs for Monstargears TKLs — Felix Jen

Released on October 18, 2021

Replacement PCBs for Monstagears TKLs

The KF87 Hotswap PCBs are designed to fit a variety of Monstargears TKL cases including the K80 and other similar designs. Each PCB features individually addressable per-key RGB lighting as well as the latest Kailh v2 White sockets with extended service life. The PCB was extensively tested by Monstagears and FJLabs to ensure compatibility and fit with all existing XO Hotswap PCB cases. Each PCB has QMK and VIA compatibility out of the box.


Pictured rendered on Keyshot by FJLaboratories:

Technical Details

Specification Value
PCB Thickness 1.6mm
PCB Material Tg 170-180 FR4
Surface Finish ENIG – 1U Thick
Copper Weight 1oz/ft2
Soldermask Gloss White
Maximum Power Consumption 450mA
Standby Power Consumption 50mA
Overall Dimensions 347mm x 120mm
Microprocessor AT90USB646-MU
Firmware Download (VIA) Download Firmware
} VIA JSON Download Download VIA JSON
QMK Repository Firmware GitHub Link
VIA Repository GitHub Link

Where to Buy

The KF87 Hotswap PCB has completed its group buy stage and is not available for purchase at this time.