It actually consists of a tunable field strength meter. The circuit is of an old documentation and the circuit must be tuned to the frequency to be monitored. The circuit offers the option to use a headset.
This circuit is indicated for applications in alarms generating an intermittent high-power tone in a...
In the figure we have a three-phase AC motor control for voltages up to 600 V or 1200 V depending on...
This traditional dimmer configuration with SCRs, but with full wave control was found in a 1988...