We found this circuit in an American documentation from the 80s. The integrated circuits are operational amplifiers of the time. We can test modern comparators like the LM339.
The flashing LEDs in this circuit simulate a working alarm and can serve as a deterrent to a...
This oscillator or clock generator generates rectangular signals and frequencies up to 100 kHz....
The critical component of this project from a 1988 publication is the transformer. The final power...