Week -2

Aim: 1)Simulink model of Doorbell using solenoid block.

2)thermistor to sense the temperature of a heater & turn on or turn off the fan.

Theory: A dorbell is consists of switch battery and a solenoid' a solenoid is a electronic device which converts electric energy to mechancical work.

explanation : in this a battery is provided a switch is closed for 2 sec in which current passed to the solenoid that produces electromagnetic waves due to which the metal arm ring the bell.

part1)

input scope when we pass data from pluse generator.

Output scope showing the result when the dorbell is ring for 2 second when switch is off.

2)Thermistor to sense the temperature of a heater & turn on or turn off the fan .

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.

Explanation:first input is provided through signal than goes to the circuit through scope we get to know that below 25 degree celcius the fan is off.