Re: Low Voltage to High Voltage/Low Current

OPSSSSSSS!!!

Don't worry, I have no intention to electrocute myself! Last message
missed a NOT!


On Oct 6, 10:40 pm, Arash Arfaee <erex...@xxxxxxxxx> wrote:
On Oct 6, 6:04 pm, Tom Bruhns <k7...@xxxxxxx> wrote:



On Oct 6, 3:58 pm, Arash  Arfaee <erex...@xxxxxxxxx> wrote:

Hi All,

I want to do some experiment with electronic filed. So, I am trying to
convert a low voltage (like 3v coming from 2 AAA batteries) to very
high voltage like +1 KV with very low current. Also I need to make
this circuit as small as possible. Does anybody have any idea how can
I do this?

Cheers,
-Arash

Yes--use a small transformer in "flyback" mode, driven by a small
oscillator.  You can make a self-oscillating circuit with a single
transistor which will do the job.  If the transformer has fairly high
turns ratio, it's quite possible to get 1000 volts and more from such
a simple circuit.  You will find such a circuit in the "electronic fly
swatters" sold by places like Harbor Freight.  See their item number
40122.  It's difficult to build such a circuit as cheaply as you can
buy it when the fly swatters are on sale!  It runs as designed from
two "D" cells, but it is possible to run it from 2 AAA cells, at least
for short periods.  Mine generates about 4kV.  Be careful:  high
voltage can sting!

Cheers,
Tom

Hi Tom,

Thank you very much for your advice. I checked the transformer in
flyback mode. it seems that they are working in much higher freq that
I need. I need to work with frequency range from 2 to 20 Hz! I guess I
can fix this using a capacitor, but I was wonder if you could suggest
something more appropriate for this range of frequency. Don't worry, I
am trying to electrocute myself!
Again, Thank you very much :)

Cheers,
-Arash

.

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