Introduction: Electromagnetic Induction : Wireless LED

Picture of Electromagnetic Induction : Wireless LED

Hello Everyone,

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

Picture of Parts

For this instructable we will need:

  1. A 2N2222 NPN transistor
  2. Insulated copper wire
  3. A LED
  4. A 1.5 V battery
  5. Soldering tools

You can get Insulated copper wire from old DC motors or transformers.

Step 2: The Circuit

Picture of The Circuit

Solder all the parts according to the circuit diagram shown above.

Step 3: Done

Picture of 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.


cuyler1 made it! (author)2016-08-18

i made this today with a bc547 it works the same. now i'll place each half in an enclosure an place the unit along side my many other projects in my hallway display case.

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