This two-transistor delay circuit from the 1960s was found in documentation from the time. Transistors are germanium.
This experimental AM microphone was found in an Argentine publication from 1973. The recommended...
September 2017 - The Phoenix Contact Mini 7/8 - inch (7/8 inch) sensors and actuator cables can...
This circuit uses sunrise and sunset as a synchronization signal. The circuit is from Electronics Now...