This circuit was found in a Popular Electronics from the 90s. The circuit uses common components today. The waveform of the generated signal is shown next to the diagram.
This circuit deactivates devices powered by the power grid so that when the power returns, they do...
The trigger signal for this circuit is an audio tone. Tones up to close to 100kHz can be used. The...
Found in the March 1974 Radio Electronics magazine, this circuit is designed to measure the level...