Telecontrol circuit for antitheft systems - includes electronic switches for resistor between base and collector of transistor

摘要

The electronic system is designed to switch on and off antitheft systems. This is achieved by a transistor circuit which produces a voltage to switch the antitheft system off. The switching voltage is produced when a given value resistance is introduced between to points of the circuit. The resistance is enclosed in a telecontrol unit and is in series with a simple switch. The telecontrol unit is connected to the antitheft system by a two wire cable. Closing the switch in the unit produces a voltage on the collector of the transistor which disconnects the system.