fj laboratories

Musings, deliberations, and end results.

KBD8X Hotswap — Maker Keyboards

Hotswap Aftermarket PCB for the KBD8X MkII — Felix Jen

Released on February 12, 2021

KBD8X MkII Hotswap PCBs

These PCBs were designed to fit the KBD8X MkII case by KBDFans. Two versions of these PCBs were offered to accommodate different bottom row layouts. Production PCBs include support for both regular and stepped Caps Lock. All variants include ESD protection up to 8kV contact and 15kV air discharge in accordance with IEC 61000-4-2 and EN 61000-4-2.

The PCB supports both QMK and VIA by default.

“Everything you can imagine is real.”

Pablo Picasso


Photos courtesy of Maker Keyboards:

Technical Details

Specification Value
PCB Thickness 1.6mm
PCB Material Tg 130-140 FR4
Surface Finish ENIG – 1U Thick
Copper Weight 1oz/ft2
Soldermask Matte Black – Custom
Maximum Power Consumption 65mA
Standby Power Consumption 19mA
Overall Dimensions 345mm x 116mm
Microprocessor AT90USB646-MU
Firmware Download (VIA) Download Firmware
QMK Repository Firmware QMK Github

Note: The 6.25U and 7U variants are compatible with the same firmware. Therefore, only one firmware download is provided for these PCBs.

Where to Buy

The KBD8X PCBs are no longer available for active purchase. These PCBs are sold through limited group buy and may not be available in the future.