Resonance Induction - Wireless Energy Transfer

DIY flat coils and wireless energy transfer circuit project, that works like a joule thief but with wireless capabilities!!

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You can also call it a wireless joule thief because it works from 1.5V and drives a 5mm Red LED which is super cool!! so let's get started with the project. we are going to build the coil first and then the circuit.

The circuit is very simple only one transistor is needed and the brightness of the LED is wow!!!! with only 1.5V it will lit the RED LED on its full brightness (You can try other color if you want to).

Resonance Induction Circuit.fzz

Circuit for this project

fzz - 64.81 kB - 12/07/2018 at 16:32


  • 1 × 2N2222A Transistor any NPN would work
  • 1 × Enamled Copper Wire (0.2-0.4mm)
  • 1 × AA or AAA cell
  • 1 × RED LED because it has lowest forward voltage required.
  • 1 × Super Glue that's obvious

View all 7 components

  • 1
    Build the coils

    You can skip to the end to watch the video with explaining the making of this project else, For making the transmitter coil I am going to use 100cm of 0.2mm enamelled copper wire which I have salvaged from old CFL choke transformer.

    just straighten it and fold it into half now pierce a hole onto a plastic sheet and pass the wire through it make sure to pass the junction, not the open ends. leave 4-5cm of the wire for connection now make a flat coil out it. it is easy to show the procedure of making the flat coils in a video rather than explaining with pictures watch this video to get an understanding of how to do that.

    For making the receiver coil, use the same parameters for wire i.e 100cm of 0.2mm enamelled copper wire. just repeat the same procedure we used for making the transmitter coil

    • pierce a hole
    • pass the wire from the hole
    • leave 4-5cm of wire for connection
    • make a flat coil from the remaining wire on the surface.

  • 2
    Set up the coils

    Now pierce a hole in the sheet near the end of the coils for both the receiver and transmitter. for transmitter pass the free ends to the surface because we are going to build our circuit on the surface and for the receiver pass the wire from the surface to the bottom of the sheet because we are going to connect the LED there. also make a cut in the junction of the transmitter coil.

  • 3
    Get it ready for the circuit

    As we have used the enamelled copper wire which means we have to remove the enamel from the ends if we want to make any connection. it's very simple to do, use any sharp tool to remove the enamel and then tin the wire using solder. you can also just burn the enamle but that may or may not work depending on the quality of enamel used on the wire. remove enamel and tin all the wires and we are good to go.

    we have to solder the alternate ends of the coils of our transmitter to get our resonance induction circuit to work. cut the receiver from the sheet because we are going to work on the transmitter circuit.

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John wrote 12/26/2018 at 19:25 point

This is really very cool, but what would need to change to pass 7.4v ?

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Deepak Khatri wrote 12/28/2018 at 07:15 point

you can experiment with power MOSFET like IRFZ44N and thick wire for transmitter along with thin wire and buck converter for the receiver. If you get in any trouble while making your circuit to work, feel free to ask me.

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