Trem and List, Your system sounds like the best one out there. I am still using the primitive battery and coin method but am now ready to purchase a unit such as yours. It sounds like you have gone the extra mile and built an affordable generator that does it right. You will be seeing my order come in today. Kirk S.
Trem wrote: > > Hi Ivan and list, > > There are so many ways to make a cup of coffee but it always ends up > tasting pretty much the same . I think this also applies to electronic > circuit design. You decide what it is you want and then try to figure a > way to do it. Everybody's brain works differently or we'd all be clones, > so here's the way I did it. > > I wanted to make sure the unit shut off at a predetermined voltage which > would be indicative of silver concentration so the first thing was to > design a current regulator to continuously lower the voltage as the silver > was deposited in the water. That took a couple of transistors and > diodes. I also added another transistor circuit to sense the current and > operate an LED so it could check the water for mineralization at > startup. If the light comes on at startup, the water is no good. Toss it > and start over. Just another bell or whistle but a good one. Once the > water has some silver in it, the LED illuminates showing that the unit is > actually doing something. > > Next, I added a voltage comparator which uses a zener voltage as an > accurate top reference voltage and a potentiometer dividing the voltage so > one can adjust the shutoff setting from high to low PPM. This variable > voltage feeds an op amp input and the changing voltage from the silver > production electrodes feeds the other op amp input. When the falling > voltage reaches the preset level, the op amp operates a relay to disconnect > the power from the electrodes. It also turns the LED off so the operator > can tell the process is done. I wanted a relay to make sure ALL voltage > was removed. Didn't want a small amount of leakage voltage to continue > producing colloid after the unit shut off because many people leave the > unit on and go away for long periods of time before returning to see > if the CS is ready. I wanted repeatability and accuracy. > > Shut down occurs within .1 volts so the end results are pretty much always > the same. > > I use a starting voltage of about 38 volts. This is gotten with a full > wave bridge rectifier and filtered power supply. No wall wart here. I use > a power transformer with dual voltage primary so I can make it operate on > 120 or 240 volts AC. This lets European customers have a chance to try our > generator. > > I also leave the stirring motor running until the operator shuts the whole > generator down so it continues to help reduce agglomeration while operating. > > Hope this gives a general insight into one designers concept. I'm sure > there are many ways to do the job. Let's hear from others. > > Trem > www.silvergen.com > > At 11:59 PM 7/16/00 +1200, you wrote: > >Maybe a voltage (or current) comparator opamp with a fet switch? > >If any one nuts one out, please let me know. > > > >Ivan. > > > >----- Original Message ----- > >From: "Robert L. Berger" <[email protected]> > >To: <[email protected]> > >Sent: Sunday, 16 July 2000 06:14 > >Subject: Re: CS>Away too long > > > > > > > Hi Erwin; > > > > > > I haven't found out how to program a relay with a selectable window > >for shut-off. > > > > > > Given me a schematic and I will paly with it. > > > > > > No doctor just a crotchy old guy' > > > > > > "Ole Bob" > > > > > > > >-- > >The silver-list is a moderated forum for discussion of colloidal silver. > > > >To join or quit silver-list or silver-digest send an e-mail message to: > >[email protected] -or- [email protected] > >with the word subscribe or unsubscribe in the SUBJECT line. > > > >To post, address your message to: [email protected] > >Silver-list archive: http://escribe.com/health/thesilverlist/index.html > >List maintainer: Mike Devour <[email protected]> > >
