Alarm Circuit Using Timer 555. In the circuit first get a power supply 9v battery to the circuit. Ic1 works in a stable multi vibrator mode.
It makes high frequency out of pin 3. This output is applied to the high power led which flashes for every 5 seconds of delay. The circuit consists of 7555 timer ic as main component.
When on time 5 10 15 and 30 minutes or even 1 hour.
You can use it for the snooze alarm with a buzzer. The thermistor is the main component and is used as a temperature sensor and detects fire. You can use it for the snooze alarm with a buzzer. The alarm will activate the car horn approximately 5 seconds after either door is opened and has not been properly closed.
