Unreal Keyboards · Dome Lab

EC Switch Explorer

force data: measured on our bench · build cad-2.3
A working cross-section of a Topre electrostatic capacitive switch — assembly per Topre's silencing patent JP2012-138254A, force curves from real domes measured in our lab. Press it with the button, the depth slider, or any key on your keyboard — or grab the keycap, slider, dome, or spring and drag it. Click any part to learn its job.

Slider »»

Dome (Topre) »»

Silencing ring »»

0.50 mm — absurd thicknesses allowed. Try one and watch what breaks.

Actuation point »»

2.2 mm
1.8 mm

Parts — click to inspect

  • Keycap»»
  • Slider»»
  • Silencing Ring»»
  • Housing»»
  • Domes»»
  • Conical Spring»»
  • PCB»»
  • Plate»»

Live readings

Finger force— g
Dome compression— mm
Travel available— mm
Collapse at— mm
Actuates at— mm
Capacitance (illustrative)— pF
restthreshold ▲max
NOT ACTUATED

Force curve — live

Grey: the dome's full measured curve. Shaded: stroke consumed by ring preload before your finger arrives. The dot is where you are.

hold Space 0.00 mm
Force Curve Bench Testing standard write-up Topre patent JP2012-138254A unrealkeyboards.com © 2026 Brian “BuddyOG” Gebo — Unreal Keyboards. All rights reserved.