Touch Sensors
The body capacitance can be used to operate pushbutton switches, used to operate elevators or faucets. Certain voltage tester probes rely on body capacitance. A capacitive touch sensor responds to close approach (but not force of touch) of a human body, usually a fingertip. The capacitance between the device itself and the fingertip is sensed. Capacitive touch screens don't require applying any force to their surfaces, which makes them easier to use in some respects. Furthermore, because of body capacitance, people act as good antennas, and some small televisions use people to enhance reception.
Read more about this topic: Body Capacitance
Famous quotes containing the word touch:
“You did not sense the wings beyond the gate;
you could not see,
you could not touch and feel,
actually the sea-sand
and the sea-shell.”
—Hilda Doolittle (1886–1961)