This circuit is from a time when this type of feature was not common in line cars. The pulse transformer has a 1: 1 turn ratio and the SCR admits equivalents.
We found this circuit in Radio Electronics magazine. It triggers a load (relay) by the noise from...
In this circuit we show how to modulate the pulses produced by a 555 in frequency. The circuit can be...
The LM105 integrated circuit consists of a voltage regulator integrated in a metallic enclosure. The...