A solid state Tesla coil is one of the kinds of Tesla coils available. It has several advantages over the more common spark gap tesla coil. They are less louder than conventional Tesla coils, yet they can still achieve a respectable output. They can also be made to play music through its spark, which is a cool effect. Examples of this trick can be seen by searching for musical tesla coil or singing tesla coil. They are also more friendly to nearby electronic apparatus, although caution should still be applied.
In the following instructable, I will show you how to make a solid state Tesla coil, as well as several helpful tips and hints that will come handy during its construction. I take no credit for the original design, which is Steve Ward's, with some small modifications "here and there."
While fiddling with the antenna, I accidentally burnt both of the Mosfets, so bear in mind this design is far from perfect. I'm still posting the instructable, as some of the techniques I used may be interesting to some. Try at your own risks. Results may vary.
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Step 1: Tesla Coil Parts
A Solid State Tesla coil is made by four main parts: the primary coil, the secondary coil, the topload, and the control circuitry.
The Secondary : The secondary is the long, orange cylinder. It is actually a white PVC pipe covered by a lot of enameled wire. One side is connected to ground, high voltage comes through the other side.
The Primary : The primary is powered by the control circuitry and it generates the magnetic field that the secondary uses to create the high voltage. It is the few turns of thick wire at the base of the secondary coil.
The Topload : The topload is the metallic object at the top of the secondary coil. It provides a capacitance to the Tesla coil.
The Control Circuitry : The circuits that make the tesla coil work at the correct frequency and duty cycle; based on Steve Ward's design.