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4hv.org :: Forums :: High Voltage
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Positive and negative ions

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Swik
Tue Feb 19 2008, 07:14PM Print
Swik Registered Member #1330 Joined: Mon Feb 18 2008, 09:12PM
Location:
Posts: 2
Hi everybody.

I have built a simple HV generator using a 555 timer, mosfet and a flyback. Been having fun with plasma.

What I want to know is :

Which part emits negative ions? Is it the wire coming out of the top of the transformer? Or is it the connection on the bottom of the flyback which the top wire arcs to?

Also, I have a small plasma globe. Does the HV electrode emit positive or negative ions?

Thanks.
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Crow187
Tue Feb 19 2008, 07:24PM
Crow187 Registered Member #795 Joined: Mon May 21 2007, 06:04PM
Location: Bocholt, Germany
Posts: 35
I think the plasma globe is AC...

At my Flyback the top electrode is negative, and I think this is like the most flybacks are made, but I don't know.

Lukas
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Swik
Tue Feb 19 2008, 08:47PM
Swik Registered Member #1330 Joined: Mon Feb 18 2008, 09:12PM
Location:
Posts: 2
Thanks for the info.

So, if the electrode is negative, does that mean it emits negative ions? Sorry if this is a stupid question.

And how can you tell which electrode is positive or negative?
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Andyman
Tue Feb 19 2008, 10:01PM
Andyman Registered Member #1083 Joined: Mon Oct 29 2007, 06:16PM
Location: Upland, California
Posts: 256
If the flyback has a built in diode, The red wire coming off of the top will be the positive lead (I think?), because it goes to the anode of the CRT. The other one will be high frequency AC.
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