This circuit was found in the December 1992 issue of Radio Electronics magazine. The current is a few mA and the maximum input voltage is around 12 V.
This 80's General Electric circuit is guarded by the noise-guard for operating current. The...
Found in American documentation from the 1980s, this circuit uses common components. The operating...
Found in a 1967 General Electric SCR manual, this circuit triggers in case of excess current,...