Direction indicator system for vehicle - has resistor-capacitor resonant circuit and relay with changeover contacts actuated by control lever

摘要

The circuit has a direction-indicator switch (15) connecting the selected lamps (16,17) via changeover contacts (18) either to the positive supply or to the base of a third transistor (20) depending on the position of the contacts. The contacts are operated by a relay (2) actuated by a first transistor (1) driven by a complementary second transistor (4). The output from the collector of the third transistor is connected to the base of the second transistor, which is also connected both to the relay and to the changeover contacts via a capacitor (12) and resistor.