On Fri, 16 Jun 2006 13:14:43 -0600, in message
<1150485283.80861@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>, Mike McWilliams
> I'm interested in researching scorpion venom, and have come across
>descriptions using DC voltage to stimulate venom excretion. Ranging from
>6v DC at 120ish hz to 1.2kV at 10hz.
>What I would like to do is use my computers sound card as a function
>generator to allow me to change the frequency for the voltage desired.
>I would imagine that sound card output is well below the voltages I
>require, and from what I understand is AC coupled.
>I would therefore like to take the signal generated, and use it to
>modulate a separate DC source at the frequency of the generated function.
>My question is what would be a good place to start in terms of
>components? I have little experience in electronics design, though I
>have put a few kits together.
Ah well, I found this site:
and notwithstanding its very general description about the electrical
design, it doesn't mention anything about DC offset. Given your garbling
of terminology, i.e. "6v DC at 120ish hz," my guess is you've not done
enough research about what you need just yet. A web search on "Arthropods
Electronic Stimulator" didn't yield anything outside the given article. I
recommend a visit to the local college library. Once you're a little more
clear about your design needs, you'll get better help here.
"The equipment for venom extraction was developed in 1996... This equipment
was named ''Arthropods Electronic Stimulator''... It is an electronic
equipment that produce a high frequency of electrical stimulus, modulated
by low adjustable frequency (values among 0,5-2 Hz), with low intensity and
high voltage... It has an adjust system of exposition between 0 V and 1700
Vpp... For first venom extraction, scorpions submitted to a 1,250 kV
electrical stimulus at a frequency of 0,5 Hz...."