Timers are used in various applications in our daily life. The minimum delay of one minute is attained when the pot is at a minimum value and the maximum value of the pot gives the delay of 10 minutes. When the input is applied to the circuit, the timer generates a pulse whose width is dependent on the values of the resistor and capacitor. The positive end of the battery is connected to pin1 of the IC while the negative end is connected with pin8 which is coupled with pin4. The output pin is connected to the buzzer through a resistor R2. The variable resistor and capacitor also called timer elements are connected across the power supply and threshold pin. When the switch is pressed, the trigger pins get the negative supply, and thus the IC is triggered. The IC is disconnected from the supply through the switch at Pin2 (Trigger pin). The circuit uses 555 timer IC as its key component along with the variable resistor which is used to change the time duration of the output pulse, a buzzer used to produce alerts, and a few other components.
0 kommentar(er)
