This traditional signal injector configuration was obtained in a 1977 amateur radio manual. The frequency is given by the capacitors and the supply can be made with 1.5 or 3 V.
This 1969 Electronics World power supply has 5 V to power digital circuits and a 170 V output for...
Found in a manufacturer documentation from the 90s, this circuit makes use of period components. The...
This RCA circuit provides timing intervals from 5 to 120 seconds. The components are of the time,...