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Solanis H87C/H88C Replacements — FJLaboratories

H87C and H88C Replacement Hotswap PCBs — Felix Jen

Released on March 06, 2022

Solanis H87C/H88C Replacement PCBs

Project Solanis was developed as an aftermarket replacement solution for existing H87C and H88C boards including Mr. Suit and Frog TKL. A total of 4 variants were created for those that want varying bottom row layouts and those that have flex cut preferences. Special care was taken with the bottom row to ensure support for boards with tight tolerances and reduced case clearance such as the Frog. Additionally, a breakoff USB-C port was provided for that wish to use the PCB with daughterboard-only designs. By popular demand, F12 and F13 compatibility is standard across all variants and both 6.25U and 7U layouts contain support for split-spacebar. The top row of the TKL cluster was flipped to allow support for the “Geon Plateless Kit” in compatible boards. Underglow was provided through an array of miniature addressable RGB LEDs, each with their own power filtering to ensure long runtime and stability.

PCBs were prototyped in Gloss Black, but the final boards will be released in Brilliant White.

Special thanks to the Apollo Project for their work on the Gummy O-Ring Outline and USB Breakout Cutouts. Click here for more information on the Apollo Project.


Images rendered by FJLaboratories on Keyshot as well as provided by Technology Brother.

Technical Details

Specification Value
PCB Thickness 1.6mm
PCB Material Tg 170-180
Surface Finish ENIG 1U
Copper Weight 1oz/ft2
Soldermask Brilliant White
Maximum Power Consumption 500mA
Standby Power Consumption 12mA
Microprocessor AT90USB646-MU
QMK Repository Firmware QMK Github
VIA Repository VIA Github
VIA JSON Download Download JSON

Where to Buy

The Solanis PCBs will be available in group buy for a limited time to for worldwide orders starting on March 7th, 2022.