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Step #1:

Wireless Power Transfer

The first thing is to make the big coil. You can do this by putting four nails into a board and wrapping the copper wire around them.

Step #2:

Wireless Power Transfer

Then you have to make the smaller coil. It has to be about half the size of the bigger one. You need to put an LED/bulb and a capacitor on the output. I put 2 because I didn't have one that had the right value. You could also put a bridge rectifier on it to turn the AC into DC.

Step #3:

Wireless Power Transfer

Connect the power to the big coil and put the small one in the middle and the LED should light up.

Step #4:

Wireless Power Transfer

I tested different gauge wire and the maximum efficiently I got was 42.2%.


  1. joshuadp117 says:


  2. Perry Bakalos says:

    yes, it would definitely matter if either coil was touching (shorting out turns) itself…this is basically an air core transformer, and the inductance is a function of the # of turns of wire, among other variables…

  3. Nick StandardAI says:

    do you have any idea what the herts was bro? I think i got a special recipe for one.

  4. Ethan nelson says:

    What would be sufficient power? 9v? Or more?

  5. Maulik patel says:

    I m in B.E last year..
    i want to make project about WIRELESS POWER TRANSFER..
    so i request u to plz send me the method to make project..and …instrument
    on given email..

  6. sunil kumara k.m says:

    can i get your contact detail … if u dont mind????

  7. Philippe Luseyi says:

    Im also in B.Eng final year…and I also want to make a project about WIRELESS POWER TRANSFER. my email is: THANK YOU

  8. Ahmed Aleshinloye says:

    I am also planning to use this as my undergraduate project topic, but apart from using an induction coil, can I make use of radio wave to transfer power to any gadget