This power control was found in a 1968 power circuit manual. The SCRs are according to the power of the controlled load.
This latched circuit uses an LDR as a sensor. It must be powered by a voltage of 5 V....
This amplifier must be supplied with a voltage of 24 V and the resting current is of the order of 4...
This very high voltage (VHT)generator was found in a 1995 documentation. The transistors must be...