Introduction: DIY Simple 220v One Transistor Tesla Coil

A Tesla coil is an electrical resonant transformer circuit designed by inventor Nikola Tesla in 1891. It is used to produce high-voltage, low-current, high frequency alternating-current electricity.

Step 1: Description

The video describes how to make a Tesla coil with the help of only a few components:

- Fluorescent lamp ballast (one or two , 370mA-740mA)

- UF5408 or similar ultrafast diode

- 1 microF/400v MKP capacitor

- IRFP250 or similar Mosfet Transistor

- 12v/1w Zener diodes - 2pcs

- Potentiometer 10 kOhm

- 12 kOhm 1/2w resistor

- coils (primary and secundary)

Step 2: Building

Characteristic of this design is that it does not use expensive elements like transformers and capacitors, it is easy to make and produces a relatively large spark of 5 cm and more. As you can see in the video, I also experimented with a light bulb instead of a ballast, but for this purpose the light bulb needs to be 200W or more. The primary coil contains 5 windings of insulated wire with a cross section of 2.5 mm^2 , and the secondary coil contains 1000 windings of wire with a cross section of 0.15 mm^2. With the help of the 10km potentiometer, the oscillation threshold of the primary circuit is adjusted as well as the frequency, and thus the size of the spark.

Step 3: Schematic Diagram

As you can see Schematic diagram is extremly simple and the results are excellent. The length of the spark is more than 6-7 cm.

And a very important note: The device is powered directly on 220V so you must adhere to all safety rules.