Week -2

Doorbell simulation with solenoid block

Design

1) 12 v battery power source is connected with solenoid

2) power source signal is controlled(on/off) by switch

3) switch is controlled by a signal generated by pulse generated block

4) Ideal transitional motion sensor is connected to solenoid to detect the motion.

5) Motion sensor signal is provided to scope for results.

6) Mechanical and electrical references are provided respectively.

Result:- Simulation functionality is observed by chart provided by scope. solenoid is getting on and off intermitantly in accordance with signal provided by pulse generator. solenoid mechanical part is moving around 3 mm up/down ( in/out) as a bell knocker.

Thermistor controlled fan

Design

1)signal builder block is generating signal and providing it to controlled temperature source.

2)Controlled temperature source is providing heat to thermister.

3)Thermistor is connected in series with resistor and battery powered supply.

4)Voltage sensor is connected paralally to measure current passing through resistance.

5) Voltage sensor is providing signal to switch which turn on and off fan.

6)scope block is connected for results display

Result :- Simulation will run for 50 secs. signal builder is providing temperature value changing with time. thermistor recieves temperature value. Due to varying signal value thermistor,resistance and battery loop will have varying current value. measured current will be given to switch to turn on and off below and above 25degC.