Introduction: Electromagnetic Induction : Wireless LED
In this instructable we will be glowing a LED using induced current in coil.
How current is induced in coil?
When magnetic flux linking the coil changes an emf is induced in the coil whose magnitude is given by Laws of electromagnetic induction.
Step 1: Parts
For this instructable we will need:
- A 2N2222 NPN transistor
- Insulated copper wire
- A LED
- A 1.5 V battery
- Soldering tools
You can get Insulated copper wire from old DC motors or transformers.
Step 2: The Circuit
Solder all the parts according to the circuit diagram shown above.
Step 3: Done
Now place the coil of the LED above the coil of the transistor.
You could see the LED glowing due to induced emf in the coil of the led.