Week -2

Door bell

To make a simulink model of a doorbell using solenoid block.

 Here first we are going to study the Simulink model of the doorbell using a solenoid block. We need to access the Simulink with the block parameters to run the simulation. First, we need to get to understand the theory behind the Doorbell mechanism.

For that we are using the below blocks


Pulse generator
Solenoid
Battery 
Switch 
Ideal motion motion sensor
Solver Configuration
Electrical and Mechanical references
Scope

After they have to connected as per the model

Then now we have to assign the values as per the given question, from the question we have situation that the switch has to be closed for 2 seconds and then release for 2 seconds.

We have to assign the values in the pulse generator the amplitude at 1, seconds period at 4 sec(2+2), phase delay 2 sec and pulse width 50%.
Battery at 50 volts

Then we will run the at stop time 10s

From the scope we can see the results 

Thermistor

We have 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