Electrostatic Capacitive (EC) Switch Design
Many of you will be wondering what an electrostatic capacitive switch is, what is different compared to a regular mechanical switch, and of course why you would want to buy a keyboard with EC switches over typical Cherry MX switches.
Most of the components which make up an EC switch are exactly the same as a regular Cherry MX switch. They still have a stem, housing, spring, slider and contact leaves, and are compatible with keycaps and keycap sets that have traditional Cherry MX mounting. The difference between a Cherry MX switch and a Varmilo EC switch is the method of registering a keystroke.
A Cherry MX switch registers a keystroke when the slider is pressed down enough for the metal contacts to physically touch. EC switches use electrostatic capacitance to register keystrokes. As the switch is pressed, the contacts come into close proximity. There is an electric field between the contacts, and as the switch moves this field is disrupted, causing a change in electrostatic capacitance. This change is measured, and a keystroke is registered when a certain value of electrostatic capacitance is reached.