Found in a 1967 General Electric SCR manual, this circuit triggers in case of excess current, causing the fuse to blow or a circuit breaker to open. The components are from the era.
Found in a 1970s RCA documentation, this circuit uses a relay to control external loads. R1 is 150...
The figure shows the equivalent circuit for the LM381 audio preamplifier IC. The circuit was found...
The circuit shown is for testing both signal diodes (low current) and rectifiers (high current). The...