Week -2

1-simulink model of door bell.

1- the pulse generator is used to create sqaure wave pulses for a period of 4 secod with delay of 2 seconds and a ampltude of 1

2-a switch is used to turn on and off the circuit with help of pulse generator

3-ideal translation motion sensor is used to sense the motion of solenoid pllunger which is going to ring the bell.

4-the ideal translation sensor is coonnected to ps simulink and to the graph

4-the motion of the plunger is shown in the graph.

2-thermistor

temperature source-20°C from 0 to 10 seconds, 27°C from 10 to 23°C from 30 to 50 seconds

fan condition - ON if the temperature above 25°C , OFF otherwise

thermister simulink moodel

1-the signal builder block is used to generate 3 differnt signal for 50 sec interval of time.

2-which is connected to controlled temerature source which generate temperature according to signal builder.

3-a thermister which is connected with current, voltage sensor and with a dc vlotage source of 100v.

4-the B port of the controlled temerature source is connected to A of the thermiste.

5-the current varies according to the temperature rise and fall

6-a condition is created when current cross 0.1A the the switch block switch on the fan . if below 0.1 the switch remains closed.

7-if switch is on it could be connected a fan

block diagram

current-

switch condition