Week -2

1)

Aim:

Make a Simulink model of Doorbell using solenoid blocks satisfying the conditions such that,when the switch is closed the electromagnet receives electrical power from the battery and pulls the metal arm to hit the bell producing sound.Create a situation where the switch is closed for 2 seconds and then released. Observe the physical movement of the plunger.

Theory:

The electromagnet is powered and generates a magnetic field that attracts the plunger towards it. The striker strikes the bell When the striking arm strikes the gong, the contact is broken and current stops flowing through the circuit. This causes the electromagnet to lose its magnetic field.

Procedure:

Provide input using pulse generator such that phase delay is 2 seconds.

Results

Input

Output

Simulink file:https://drive.google.com/file/d/1VJa2GV34KJPzdXJtWDLHi9P2OHRzxFYW/view?usp=sharing

2)

Aim

Use a thermistor to sense the temperature of a heater & turn on or turn off the fan as per the below conditions,Temperature source: 20 °C from 0 to 10 seconds, 27 °C from 10 to 30 seconds, 23 °C from 30 to 50 seconds.Fan conditions: ON if the temperature above 25 °C, OFF otherwise

Procedure

Since our required result is to switch on the fan at 25 °C.At 25°C the voltage across the resistor is .01183 V applying this condition the switch will be on.

Input

Output

Result

Fan will be on from 10th to 30th second.