FIELD: electricity.
SUBSTANCE: invention relates to electrical engineering and electronics and can be used in electrical devices for switching on/off electrical circuits for controlling, signaling, electrical interlocking, as well as components of devices for inputting information into cellular telephones and computers. The sensor device has two sensitive electrodes, one of which is connected to an alternating voltage source, and the other to a capacitance-to-digital code converter, which is connected to an external control device, the output of which is connected through a light-emitting-diode control circuit to the light-emitting-diode fitted in the sensor.
EFFECT: more reliable fixation of the button due visualisation of its state.
2 cl, 5 dwg
