Instructables

Make a Plasma Globe out of a Light Bulb!

Have you ever been fascinated by a plasma globe? Have you ever wanted to build your own? In this instructable, I will be showing you how to make a plasma globe out of an ordinary light bulb! 

Before we make this project, I have to warn you of the safety issues.
This device outputs high voltages as much as 25,000 volts and can kill you. DO NOT SUBSTITUTE ANY PART OR PARTS FOR COMPONENTS OF DIFFERENT VALUES! It is crucial for your safety. I would recommend you do some research on high voltages before attempting this project. Also keep in mind that this is not a beginner level project and you will need to have experience in working with flyback transformers, high voltages, and lethal currents.

You have been warned.


 
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Step 1: The Methods: 1 and 2

There are two methods to making a plasma globe. Both use AC flyback transformers, but they use different drivers. This is important to know because you will be building the driver yourself and you want to choose your method based on a few different factors. 

Method 1 uses a 555 timer to switch on and off a mosfet. It uses less components and is easier to build.
Method 2 uses a TL494 chip that can be bought online. This one is more complicated, but it gives you more control over the circuit and even lets you input audio. 

I recommend method 1 for beginners because it is easier to get the desired frequency that you want. The frequency is also set to a safe value assuming you use the correct components. This is important because if the frequency is too low, then you will get a nasty shock. At the end of this instructable, I will show 2 videos that tell you how to tune the driver so that the arcs are safe to handle.

in method 1 where to connect +12 v

no connection is given in 4 or 8

leafar_br made it!2 months ago

ALGUÉM POR FAVOR ME AJUDE A PRODUZIR UMA PEÇA DESSA:

SOMEONE PLEASE HELP ME TO PRODUCE SUCH A PART:

https://www.youtube.com/watch?v=TemoqwwnUns

download (3).jpghqdefault.jpgimages.jpg
Dillon123 5 months ago

neat project, have you done a zvs driver

dell_md6 months ago

hi
i have some question :
1-i have high frequency AC power supply(from very old mini Tv)

how can i attach this High Voltage to circuit(for Tl494 circuit)?

2-can i use IRF 540n MOSFET instead of (IRFP250, IRFP260, IRF540, IRFP450, IRFP064)??
thank U!!

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clevelandstorms (author)  dell_md6 months ago

Hello,

That looks like an old AC ferrite transformer. Take some wire, maybe around 20 gauge, and wind 7 turns on the exposed ferrite core. That will be your primary, and attach the two ends to the TL494 circuit. You can use an IRF540, but it will get very hot so use a large heat sink. Hope this helps!

ariizu6 months ago
is it safe to hold in your hand? sorry if I missed it in the description ^^
clevelandstorms (author)  ariizu6 months ago
It is safe to TOUCH the lightbulb when it is running at low power, not HOLDING it. You will find that your hand will get very hot after touching the bulb for more than 5 seconds. I am not responsible for any injuries, but you should be ok to touch it. Be careful!
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