This 1977 circuit only allows the solenoid to energize if the right combination of switch positions is selected. The relay is 6 or 12 V depending on the low voltage supply used.
This switching boost regulator, which provides a 24 V output from a 12 V input, was found in the...
This circuit time the activation of appliances and electronics when the power is cut, thus...
This FM detector circuit was found in a 1977 documentation. The circuit uses a 1977 Signetics...