Week -2
^^^^Above shown is the simulink model for Door bell^^^^
Required blocks for DoorBell
- Battery
- Switch
- Solinoid
- Ideal Translation sensor
- Pulse genertor
- Scope &
- Solver
Model working procedure
When switch circuit is closed the current from the battery passes through the solinoid and actuate the Plunger piston which goes and hit the bell hit the bell and create loud sound
Pulse generator is used so that the switch 'ON & OFF' can be control with time for every 2 seconds.
Solenoid block is connect to battery for DC power and other ports in solenoid block R & C are connected to Ideal Translation sensor block to take the position of plunger
Scope block is used to plot the position of plunger against the corresponding time
in Circuit closed condition , the plunger is moves toward the bell by 5 units for 2 seconds and then return to normal position by the return spring and stay in that positon of two seconds which is one complete cycle
Thermistor Challange:
Thermister is used to control the Fan On and OFF condition
Signal builder is connected to Termpertgure control source which give input temparature to Thermister.
The Thermister resistance is inversely propotional to Temperature which is When termparture increase the resistance at thermister will decrease.
To check the Thermister resistance at varying temperature the block is contruct.
as per ohm law V=IR, R=V/I
so when Temperature falls above the 25C , the switch is changed to ON mode and if it falls below 25C, the switch is changed to OFF mode.
Switch output
