Week -2

AIM 1

Make a Simulink model of Doorbell using solenoid to simulate movement every 2 seconds.

Simulink mode below:

Input given to model ( wave of every two seconds )

Output at solenoid

Explaination of model:

1. Squarewave generator used to generate a pulse every 2 seconds

2. Pulse fed to a switch, which close on pulse input.

3. Swicth connected to solenoid which is connected to a montion sensor. Solenoid replicates the movemenet similar to a bell .

4. Reading at motion sensor , fed to a scope which shows the movement at every 2 second interval.

AIM 2 ( NOT complete)

Use a thermistor to sense the temperature of a heater & turn on or turn off the fan . SImulate Temperature source 0 to 10 time : 20 degree, 10 to 30 time 27 degree, 30 to 50 23 degree. Fan should turn on if temp > 25 degree

I am not able to get the desired output. Blocked at how to adjust the thermistor values to get the desried voltage. I have used a signal builder to generate a wave output for the given condition of time and temperature. Usewd siwitches to pass the signal to the DCmotor circuit.

Thermistor mode

Input from signal builder