A very simple electronic touch switch can be constructed using this circuit diagram . This electronic touch switch is based on two transistors an can activate a relay , when the touch sensor is ...

The input impedance of the trigger is very high and the touch sensor switch can be triggered by the voltage induced in the human body. The relay is a 12 V DC relay operating at currents less than 200 ...

Watchdog Timer Enables Capacitive Touch Sensor Sept. 24, 2009 A simple four-component circuit allows a single I/O line from any microcontroller to sense the states of two capacitive touch sensors.

Transparent and flexible graphene-based touch sensor. (a) Schematic diagram illustrating the concept of a graphene-based capacitive sensor. ... The resulting graphene-based 3D touch sensor can be ...