Lighter key action with 0603 resistors on the dome caps
markatlnk halved the keyboard's actuation force from about 500 g to 250 g by sticking 0603 resistors on the rubber dome caps as tactile bumps.
What it takes
- Disassembly
- Purchase required
Difficulty 2 of 3 — moderate.
Details
The stock keyboard needs roughly 500 g per key. markatlnk stuck 0603 resistors (about 0.4 mm thick) to the top of each rubber dome with 3 mm squares of double-sided tape; the tiny bump concentrates the force, so keys actuate at about 250 g with clearer feedback. It is fully reversible and can be tried on a few keys first.
desertkun's simpler variant a year later: 0.8 mm double-sided tape (backing left on) under the keyboard PCB gives a similar reduction without touching the domes; arbitar suggested a full-size TPU insert. beams' printed diffuser is the current take on the same problem.
Links
Open at Forum threadRelated mods
Open-source QMK port of the keyboard firmware: Select + ball scrolls, Fn + G game mode, precision mode, tap-hold keys and a web tester, flashed over USB.
lululvlv's replacement keyboard puts a BlackBerry 9900 optical trackpad where the ball was and runs ZMK; sold on Tindie and hack2you.tech since late 2025.
ClockworkPi's flash tool updates the keyboard's STM32 over the internal USB with dfu-util, no disassembly; the UART route and the S1 pads recover a bricked one.
The 0.1 mm diffuser film dims the backlight; pulling it out brightens the keys, and beams' printed 95A TPU diffuser evens the light and lightens the key feel.
A modified build of ClockworkPi's own Arduino firmware: QMK-like trackball smoothing and Select + ball scrolling without QMK's USB power quirks.
A clean rewrite of the stock keyboard firmware on STM32 HAL: ten switchable layers, a better trackball curve with inertia, Fn lock and auto-dimming backlight.