This circuit was found in a 1965 General Electric manual. It is intended for cars that have negative ground. At the time there were vehicles with positive mass.
In this circuit, the output voltage is slowly established, thus avoiding the impact when...
Found in an 80's Elektor, this circuit can use any equivalent optical coupler. The buzzer is of the...
This circuit was found in a 1965 General Electric documentation. SCRs and unijunction may be...