Come, let us explore following topics -

1. Relays.
2. Sensors.
3. Remote control.
   
4. USB.
5. Microcontrollers.
6. LEDs.
   

1. Relays

1. Relays-What is inside.
2. Relays- how they work.
3. Relays- how to control.
4. Relays- How many types are there?
5. Solid State Relays – The inside secret.
6. Relays- How to control them by Computer.
7. Relays- How to control through RS232.
8. Relays – How to control through USB.

2. Sensors-

1. Pressure sensors -Let us understand them.
2. How to choose the best pressure sensor?
3. Thermocouples-The inside out.

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