In the figure we have a good rectangular signals generator with several frequency bands. The circuit is based on old logic but can be implemented with modern equivalents.
Found in an American leaflet from the 90s, this circuit uses an AM radio out of station to monitor...
The Texas Instruments PLLatinum ™ synthesizer can be obtained from Mouser Elecgtronics to generate...
This circuit will trigger a buzzer with an oscillator if the ignition key is removed with the...