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PG13
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37
Home Brew Plasma Ball
I spent quite a while trying to find the “perfect” light bulb just for this purpose
and have yet to find one. The best one I have found so far has been a 100
Watt Philips Clear Globe light bulb. It is fairly large, and it ionizes easily. I was
able to find this in our local Home Depot, though it had plenty of dust on it,
suggesting it isn’t a very popular bulb. The model number is 808472.
What you’ll need:
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Some way to hold the light bulb that is non-conductive. I used a large
plastic cup for temporary tryouts.
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A piece of wire long enough to wrap around the base of the bulb, and the
top terminal of your PG13.
What to do:
1. Turn off the power.
2. Set the bulb on its side in the cup, base away from you.
3. Run the wire from the HV terminal to the base of the bulb. You only
need to tie wrap it.
Turn the power on and you should at the very least see corona points on all
of the tips of the filament holders. The best you will see is the entire light bulb
lit up by purple and orange streamers.
Try holding your hand near the bulb, and watch the streamers reach to your
fingertips. Note the nice purple discharges between your fingers and the glass
of the bulb. Just don’t hold your fingers in any one spot for too long, the glass
will get hot quite quickly!
To make a more permanent display you will probably want to get a hold of a
ceramic light bulb fixture, and remove most of the metal from the inside. All
you need is a wire to run from the PG13 to the bulb. All of the screws,
mounting brackets etc. will just make for a lot of leakage points reducing your
output voltage. Mount the bulb and fixture onto a plastic box. Use high voltage
wire (from an old TV flyback or supply house) to permanently wire your
plasma ball.
If you have trouble maintaining streamers in the bulb, which can vary
according to atmospheric changes, you can place the bulb near a wall, or
place a bottle of water nearby. Do not allow discharge to nearby objects, as
this will overheat the glass!
Содержание PG13
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