1. MICROCONTROLLER: It is a processor which takes input and after processing it gives output.

2. SETTING BUTTONS: These buttons used to set that after how much whistles gas regulator get off.

3. PRESSURE COOKER WHISTLING SENSOR: This sensor is used to detect whistles.

4. ALARM: This alarm is used to indicate the food is cooked and also to alert us in case of risk.

5. GAS REGULATOR: Gas regulator is use to regulate output  of LPG at the time of cooking food. 

ADVANTAGE AND APPLICATION:

1. N o wastage of energy
2. Safe food
3. It can be used in boiling milk and baking oven.

FURTHER MODIFICATION:

1. On using temperature sensor, pressure sensor we can use it to make an advance kitchen appliances.

MICROCONTROLLER: microcontroller is used to generate time which is then set according to input button to control home appliances.

INPUT BUTTON: Input button are used to set the time for appliances to control according to setting times.

APPLIANCE SWITCH: This switches are used for switching home appliance like fan, light, TV etc.

DISPLAY: Seven segment display is used to display time. It will display two digit hours and two digit minutes. Seconds will be display as blinking dot.

C ircuit Diagram of Digital Clock :