After some searching, I ended up using a microcontroller and a piece of code borrowed from the web that I tweaked and adapted. The microcontroller-based concept was chosen because I wanted to scale ...

The trigger/amplifier circuitry inside the sensor is used to monitor the amplitude of the oscillator, and at certain levels (predetermined levels) the circuitry switches on (or off) the sensor/switch ...

The sensor shown here is essentially two plates mounted side-by-side, attached to an Arduino Nano using the Capacitor library which uses just two pins, one digital and one analog.

Elliptic Labs has launched its AI Virtual Proximity Sensor™ INNER BEAUTY® on the new HONOR 200 and 200 Pro smartphones.

Elliptic Labs has launched its AI Virtual Proximity Sensor™ INNER BEAUTY® on the new HONOR Magic V Flip smartphone.