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How to make a Plasma Globe from a lightbulb without rewinding the flyback? Answered

Hi, I noticed that on here: https://www.instructables.com/id/Make-a-Plasma-Globe-out-of-a-Light-Bulb/, You have to rewind the flyback. How could this be accomplished without doing that? Thanks!

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Josehf Murchison

Best Answer 3 years ago

Depends on the flyback you are planning to use I have 3 12 volt flybacks for B&W TVs but only 1 doesn't have a built in rectifier. As long as you have a flyback without a rectifier you do not need to rewind the flyback.

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steveastroukJosehf Murchison

Answer 3 years ago

This is another Ible where the writer doesn't know what they are doing: as soon as you read "Transistor gets very hot", you know they aren't running the thing correctly

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Laserbeamtoaststeveastrouk

Answer 3 years ago

What about the whole circuit isn't right and what could I do to prevent this?

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steveastroukLaserbeamtoast

Answer 3 years ago

Look at my instructable on flyback transformer theory. The problem is overdriving the transformer.

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Josehf MurchisonLaserbeamtoast

Answer 3 years ago

In general the circuit is good what is off is the number of turns on the flyback primary most flyback drivers use 10 turns and for that mosfet you do not want to exceed its wattage. The IRF540 is a 150 watt mosfet and you don't want to put more than 12.5 amps through it at 12 volts or it is over wattage. You want to keep the wattage down to keep the transistor cooler.

You can find a number of flyback drivers on the net by Googling "Flyback Driver".

You can look up the datasheet here:

http://www.maxim4u.com/

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Josehf Murchisonsteveastrouk

Answer 3 years ago

Don't tell him that now you might deprive him of watching a transistor blow.

I didn't even read the Ible I just answered his question about the flyback.

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iceng

3 years ago

Plasma globes can use high voltage because high frequency skin effect that keeps the dangerous current from going through your heart and body....

tesla-coil-2.jpg
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rickharris

3 years ago

As it says in the Instructable

"

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."

I think you should heed this advice.

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Downunder35mrickharris

Answer 3 years ago

1+
Reading instructions avoids asking nonsense questions.