How To Build A Tesla Coil

The legendary Tesla Coil was created by Nikola Tesla in 1891 to perform many experiments creating high-voltage electrical discharges. Nowadays, many are interested in making a Tesla Coil. So if you’re one of them then here are all the instructions about how to make a Tesla Coil.

The first thing you have to do is to think of the size, placement and power requirements of the Tesla Coil you’re going to build. You can build one as large as your budget allows. Be careful of the lightning-bolt-like sparks which looks more like a thunder the Tesla Coil creates using heat and expanding the air around them.

Don’t ever think of building the Tesla Coil inside your house, chances are you may burn your house. You should build the Tesla Coil in your garage or in an out-of-the-way place. People also get confused in figuring out how much spark gap they should leave and how much power is needed to make it work.

For a little, homemade Tesla Coil, just two inches is enough. And to measure how much power is needed, divide the length of the spark gap in inches by 17 and squire it to determine the input power in watts.

To build a Tesla Coil, you need a power supply transformer, a high-capacitance primary capacitor, a spark gap assembly, a low-inductance primary inductor coil, a high inductance secondary inductor coil, a low-capacitance secondary capacitor and something to suppress or choke, the high-frequency noise pulses created when the Tesla Coil operates.

First, choose the power supply transformer you want. How large your Tesla Coil will be determined how big your transformer is. Most of the Tesla Coil is being operated with the transformer that puts out a voltage between 5, 000 to 15, 000 volts at 30 and 100 milli-amperes currents. You’ll find a transformer from a college surplus store.

Then, you’ve to make a primary capacitor. The easiest and best way to make a capacitor is to wire some tiny capacitors in series so each capacitor handles the same share of the primary circuit’s whole voltage.

After that, you’ve to design the spark gap assembly. If you want a single spark gap then you’re going to need metal bolts at least six millimeters thick to serve as the spark gap to face the heat that will generate a discharge of electricity between the sparks. With rotary spark gap, you can wire many spark gaps in series and can blow compressed air between the sparks to moderate the temperature, in this case, you can use a vacuum cleaner.

Now, it’s time to build the primary inductor coil. The coil itself will be fully made of wire, but you have to wrap the wire with something cylindrical, like cardboard or plastic tube to give it a spiral shape. It has to be a copper wire which you’ll get from any electrical supply store.

Now, to complete primary circuit, you’ve to connect the primary capacitor, spark gap assembly and primary inductor coil together. It’s time to make the secondary inductor coil. The secondary coil should have the similar resonant frequency as the primary coil for the Tesla Coil to operate efficiently.

Remember that the secondary coil must be taller than primary coil because it must have a larger inductance than the primary coil. In order to avoid electrical discharges from the secondary circuit; now create a secondary capacitor. Make sure to make it round. To complete the secondary circuit, attach the secondary capacitor to the secondary inductor coil.

Now, build the pulse chokes. They are simple, small inductors keeping pulses made by spark gap assembly from wrecking the power supply transformer. It can be made by winding the thin copper wire around a narrow tube.

Finally, place the primary and secondary circuits facing each other and connect the power supply transformer to the primary circuits by the chokes. Plug the transformers in… and your Tesla Coil is ready.

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