Week -2

1. DOOR BELL SIMULINK MODEL:

Since we need the switch to be closed only for 2 seconds, switch block is used.

RESULT:

The physical movement of the switch is observed. It is to be noted that there are some spikes which arises due to electromagnetic interfaces.

2. THERMISTOR:

The signal builder is used to generate the signals as per the conditions.

The requirement is that the Fan must be On when the temperature is above 25 degrees. The thermistor sense the temperature of the heater and it should be ON when the temperature is above 25degrees.

RESULT:

The Fan is switched On when the temperature crosses 25 degrees. It is switched OFF below the threshold limit. The threshold limit is set as 298K. Voltage sensor is used to measure the voltage and it is found that the voltage at 298K is 0.23.