This commercial clock circuit was found in the August 1976 issue of Radio Electronics magazine. The circuit uses a period module and includes power from a special transformer.
This game was found in an old Popular Electronics. The unijunction transistor can be 2N2646. The...
This circuit interrupts the power supply when grounding is missing. The circuit is from an old...
In figure 1 we have a circuit that turns on after a certain time and then turns off, also after a...