Week -2

1.Simulink model od Doorbell

To make this scenario in simulink we need few blocks.

1. Battery - Power source
2. Soleniod - Act as a switch for power.
3. Switch - On/Off the power supply
4. Electrical and Mechanical reference -  Act as a ground and rigid support
5. Ideal transmission sensor - To sense the mechnial movement
6. Solver 
7. Scope
8. PS to Simulink and Simulink to PS conventor.

  Explantion:

Pulse generator is used to generate the pulse of 2 second on and 2 second off.Since the signal from the pulse generator cannot be read directly by the switch model we use a convetor which turn the PS signal to physical signal which can be used as input of the switch( On/off). So whenever the switch gets 'ON' power from batter will pass towards soleniod and make an movement. That movemet will be read by the motion sensor, here we are using Ideal Transitional Motion sensor, since it a linear motion. 
Output from the motion sensor will in physical signal which will converted to unitless output signal.Scope block is used to give the graph of the process from the converted output.Where we can see the movement made by the plunger during the power supply period.

                                                                              MODEL BLOCK 

                                                                              GRAPH OF PULSE GENERATOR

                                                                              PLUNGER MOVEMENT

Thus Doorbell by using the soleniod in Simulink is done.

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