Panic Alarm Circuit Using 555 Timer. The process of resetting the 555 is done by pressing the reset button. This sets the flip flop and the output pin goes high and remains in this state until an external reset signal is given.
On pressing the set button the trigger pin 2 goes low vcc 3 making the output of lower comparator inside 555 to go high for an instant. In our case we need two. A panic alarm circuit is used to send an emergency signal immediately to the people in nearby location to call for help or to alert them.
The process of resetting the 555 is done by pressing the reset button.
We can change the frequency of the circuit by changing the value of resistors 100k 22k and capacitor 10uf. The process of resetting the 555 is done by pressing the reset button. The possible panic situation can be any it is not restricted to few situations. In our case we need two.
