Found in a 1965’s General Electric documentation, this circuit can be designed with modern equivalent transistors depending on the current of the controlled motor.
Found in Popular Electronics from the 90s, this signal tracer or tracer can be used with the inner...
This circuit is from a Hughes documentation from 1968. The components are of the time and the RC...
This circuit was published in an English magazine from 1980. The magazine no longer exists, but...