Re: Looking to build a simple solar powered hi voltage low current power supply

On Sat, 30 Jun 2007 07:15:37 -0400, in sci.electronics.design default
<default@xxxxxxxxxxxxx> wrote:

On Sat, 30 Jun 2007 10:09:05 +0200, martin griffith
<mart_in_medina@xxxxxxxx> wrote:

Robert Miller wrote:

I need to build a solar powered colloidal silver generator.

AFAIK you can't 'generate' silver from electricity !

Graham

The silver is supposed to come from the silver electrodes - they
corrode leaving some super small particles suspended in the water.

In theory at least . . .

Silver has bacteriostatic properties and is a weak bactericide.

Personally, I think the "colloidal silver" hype is just a lot of
snake oil, but someone has to test this crap . . .

Copper might be just as effective without the electrolysis since it
tends to be a much stronger bactericide and corrodes fairly easily,
but unlike silver it is easier to OD on too much of a good thing.

A few years ago I designed the hardware to automate the filling of
water cooler bottles. The company had a patent on how they did it, but
they used colloidal Ag as the steriliser, and it passed all the
bacteriological tests.


martin

That's impressive. Any idea of the quantity of silver in suspension
and how they measured it?

It wasn't that impressive, about 3 or 400 lines of C on an 8051, most
of it was system self checking, and extreme idiotproofing and a rugid
optical isolated i/o interface.
It was straight linear drop through C, very simple

They just gave us the Ag solution, the containers only had "
sterilising fluid" on them. In those days I didn't even know it was
Ag,


martin

The 3-400 lines of C on an 8051? 3-4 hundred lines of code on an 8051
controller?

So I guess you're saying that there was a way to check the strength of
the fluid you were being supplied?

I wondered more about the detection technique. Conductivity or
particle size, automatic titration or something more sophisticated?
Did you check the solution itself or the rinse water?
ISTR at89c51, but since the systems were hired out, there was
significant datalogging, checking flow rates and to prevent
moonlighting.

We used a simple conductivity meter, (10V dc, 100K resistor, and a
comparator) to make sure they didn't try and swap the sterilising
agent with a bottle of water, or try to run it without the sterilising
agent

There was no testing of the fluid, in the software specs


martin
.

Relevant Pages