This circuit uses a contactor having been found in a 1987 publication. More modern equivalent devices may be used. The circuit has neon indicator lamps.
We found this circuit in the Motorola Linear Databook published in 1990. The circuit can be...
This circuit was found in an English publication from 1967. The circuit is for listening on a...
Different delays for the rise time and fall time of the output signal when compared with the input...