This circuit serves as an audio output for AM or even FM radios and was found in a Radio Electronics magazine from March 1990. Note the supply voltages.
This circuit was obtained from an English magazine from 1985. It consists of a pulser that drives...
We found this time base of 0.1 to 90 seconds in a circuit manual from the 90s. The single-use...
This alarm circuit is from a 1990 Electronics Handbook. Transistor Q1 can be a BD135 and the relay...