This circuit was published in the July 1993 issue of Electronics Now magazine. It uses a sensor from the time and triggers a buzzer with a Sonalert-type oscillator.
What this circuit does is change the logic level of a signal thus serving as a different logic...
This current source was obtained from an 80's operating manual. The circuit can be applied to modern...
This notch filter or reject filter rejects signals of a certain frequency with good selectivity. The...