Week -2

Aim
Make a simulink model of doorbell and thermistor fan system
Objective
1. Make a simulink model of doorbell using solenoid block and observe the movement of plunger when switch is
closed or two seconds
2. Use a thermistor to sense the temperature of a heater and turn on or turn off as per below conditions
Temperature source: 200C from 0 to 10 seconds, 270C from 10 to 30 seconds, 230C from 30 to 50 seconds
Fan condition: ON if the temperature is above 250C, OFF otherwise

1. Model
A simplified representation of doorbell is given below

Our primary objective is to give a signal to the solenoid block for two seconds. So the required input is given using Pulse
generator block. We can customize the signal using this. An ideal translational motion sensor is used to observe the
equivalent plunger movement. Arrangement of doorbell model is given below.

Result:

Door Bell