This circuit activates a buzzer when the voltage applied to the input falls below a preset value in R1. The circuit is from an 80's American documentation.
The 78xx series is manufactured by several semiconductor companies that present ideas for use in...
This alarm siren was found in volume 5 of the 1995 Encyclopedia of Electronic Circuits. The...
This circuit can be implemented with other comparators in the same series. The circuit is from a...