Now we know how current is induced and how the fast oscillating magnetic field is created. That will induce current inside the metal. But a piece of metal is not a coil, right? Then how curent is induced? Well, actually, inside of the metal there are infinite small loops or "coils" created by the material and current could flow and these currents are called Eddy currents. So, if current will apss trough the metal, if the metal has good resistance, then it will heat up as power is dissipated.

So, I mount thie schematic before on my breadboard. As you can see we haev those 2 coils, 2 capacitor in parallel, 2 MOSFET, 2 diodes and some resistors. For the output coil I've used one that I've bought but also a homemade one. Just wind some enameled wire around a PVB tube, fix it in place and you have a coil. Just check for the inductance before using it in order to more or less as in the schematic. As you can see below, in just a few seconds the metal will get HOT.

Dependig on the material, it will get hot faster or slower and reach higher temperatures. The resistance of the metal is an important factor since is the resistance taht is heating up the metal under high currents. The electrons are moving back and forth, hitting against the metal resistance and by that loosing power and heating up the metal. Even more, the ferromagnetic properties will aslo help since the metal will magnetize and demagnetize all the time and by that ehating up even more. So, that's how this circuit works. Please watch the full video for this tutorial. Now we know more or less how induction of currents work, how we create the oscillating fast signal and how different metals could heat up faster or slower.

Finally, here I let you the full video for this tutorial on my YouTube channel. Remember to subscribe for more videos, but also to activate the notification bell in order to receive notifications where I upload new content. I hope this tutorial will help you and teach you someting new. Feel free to comment and share your ideas with our community.