generating negative air ions

I would like to make a generator of negative air ions. I know how to make a
high voltage power supply but I need to know more about what happens at the
emitter. How do I avoid also generating ozone? Is there some optimal
voltage for this? I understand that the emitter should have as sharp an
edge as possible and that it is liable to oxidation.

 

raise house plants

 

Air Ions - N2 is too stable

What else is left? O2 => O3- ? H2 to H+ ?

Ionize and you got ozone, dude.

 

Didn't some dude a while ago sell a book "the power of *positive*
thinking"?
And there are psych studies that it is not a good idea to be negative.
What the heck do you have against ions?
Racist!

 

You just want to avoid an arc (spark) in the air (usually visible and also
audible), and then you should only be getting the ions.

With Van de Graaff generators I think you can go well above 50KV without
arcing, as long as there is no ground potential nearby. Part of this has to
do with the large surface area.

-- Gary
===================================================================
In Business with Inventor of Infomercials for the price of a pizza.
Millions will join, only a few thousands know about us now.
Dream and act, because dreams do come true!
http://www.betteruniverse.com/gh0087745

 

in every car there is High Voltage Transformer. It is very cheap. You can
found it in a trash car...
It have 3 contact: +12V 0V High voltage
Connect +12v 0v to battery and a big pin to High voltage and it work!!

 

In sci.physics, giuseppe pezzella
<>
wrote

Without an oscillator it won't do a lot; transformers don't work
very well with DC. Might get a nice spark on disconnect,
though.

 

I figure that the ion generator would best have a needle point emitter so as
to encourage the electrons out onto passing molecules. I'll bet that will
also increase the likelyhood of an arc.

 

Very thin wire will accomplish the same thing, with muce more surface area.

 

Hi Charles:
Ions are just oxygen atoms with a missing electron. They are formed during
a spark occurrence or in the presence of a high electric field. Ozone is
another word for ions that you can smell. So you can't avoid creating
ozone. High voltage transformers are required to create voltages between 5kv
and 10 kv. Air purifiers are designed this way like the ones hanging from
the ceiling in a bar. If you want to just make ions, all you need is an
oscillator (555 timer from Radio Shack) and an automotive ignition coil that
has the internal drivers inside.

Harold

 

I asked about negative ions. These are atoms with extra electrons. Atoms
with missing electons have a positive charge. Electrons carry a negative
charge.

 

Get a lump of one of the items they mention here:
http://www.epa.gov/radiation/understand/beta.htm

That'll give you free electrons, such that you won't need corona-grade
voltages to encourage the ions to go out into the room. ;-)

Cheers!
Rich

 

I read in sci.electronics.design that Harold Ryan <>

Ozone is not an ion; it is triatomic oxygen, a neutral molecule.

 

Neutral in atomic charge, you mean.