This circuit, for frequencies up to 100 kHz, was found in American documentation from 1970. The circuit can serve as a reference for projects with modern equivalent components.
In this circuit, we have a sensor that consists of a phenolite plate with a labyrinth of fillets that...
This assisted ignition circuit (which reduces the spark current) dates to the time when cars had...
The small experimental transmitter of the figure can be used as a protable microphone or in...