Switching circuit for vehicle flashing indicators - has central permanent impulse generator with current control relay operation

摘要

The current control relay is connected in series with the collector-emitter layer of a switching transistor and the input of the vehicle direction indicator switch. The basic circuit of the transistor is adjusted by a first central switching contact, switching a control lamp in and out via the collector-emitter layer of a second switching transistor. The basic circuit of this transistor is connected via a change over switch of the current control relay in the working position to the first central switching contact in the off position. The two switching contacts have different impulse sequences but similar periodic lengths. There is a by pass resistor for the first switching transistor. The latter is a PNP transistor with the emitter connected to the applied potential and the collector to the current control relay.