I've got a few emails out for quantity pricing (500, 1000 and 5000 lots), and I'm going to call Motorola tomorrow (they make it and they're local), so I may be able to get a pretty good price on them. I'll let everybody know.
Yours in health, James Allison ----- Original Message ----- From: "~Ron N" <[email protected]> To: <[email protected]> Sent: Sunday, December 29, 2002 5:45 AM Subject: Re: CS>Simple Current Limiting CS Generator > American Microsemiconductor, Inc. > 133 Kings Road, Madison, NJ 07940 USA > Tel: (973) 377-9566 > Fax: (973) 377-3078 > [email protected] > > http://shop.store.yahoo.com/americanmicrosemiconductor/info.html > > This company has the 1N5295 (.82 ma) in stock for $3.16 ea. Although they > have a $35.00 min. > > Also ya might want to look into using the LM334Z IC (variable) with a pot or > 100 ohm resistor. > > ~Ron > > ----- Original Message ----- > From: "S & J Young" <[email protected]> > To: "Silver List" <[email protected]> > Sent: Saturday, December 28, 2002 7:01 PM > Subject: CS>Simple Current Limiting CS Generator > > > > > > Fellow CS brewers, > > > > Not well known is the fact that for about $5 you can easily convert your > > constant voltage CS generator (e.g. a three nine-volt battery setup) to > one > > that limits the current to assure small particle production and prevent > > current "run-away". Thus your unit would then function the same as the > > better "constant current" commercial units. I will try to describe this > in > > non-technical terms so many can take advantage of this. > > > > There is a device called a silicon FET current regulator diode that does > the > > trick. This is really a small integrated circuit, shaped like a small > > rectifier diode, that limits current flow to a set value. The regulator > > diodes are small cylinders with about a 1 inch wire coming out of each end > > of the cylinder. One end of the cylinder is marked with a band around it. > > > > The part numbers are the series 1N5283 through 1N5314, with the current > > limits in the range of 0.22 ma thru 4.7 ma, respectively. Probably the > one > > of most interest to us is the 1N5297 that limits the current to 1.0 ma. > One > > manufacturer is Central Semiconductor Corp. Go to www.centralsemi.com and > > search for 1N5297 if you want to see the specifications and a drawing of > the > > device. > > > > Using them is super simple. For example, for a three nine-volt battery > > system, just cut the wire between the minus terminal of the battery and > the > > silver electrode. Connect the wire from the battery minus-terminal to the > > "banded" regulator diode wire. Connect the wire from the silver electrode > > to the other "non-banded" regulator diode wire. One can use 2 small wire > > nuts, available at any hardware store, to make the connections, alligator > > clips, or solder and tape them. Congratulations - you now have a > > sophisticated constant current CS generator! > > > > When brewing a new batch, the current will start out very small as > before -- > > a few microamps--depending on water purity. As silver production > proceeds, > > the current will rise until it reaches the value set into the regulator > > diode. Then it will stay constant (e.g. at 1.0 ma for a 1N5297) for the > > remainder of the brew time. It is impossible for the current to "run > away" > > and increase beyond the "set point", even if the electrodes accidently > short > > together. > > > > These regulator diodes are rated to a maximum of 100 volts. That means > one > > could use a higher starting voltage (e.g. 54 volts from six nine-volt > > batteries) and reduce the brew time (it will take less time for the > current > > to reach 1.0 ma). Again, the higher voltage is perfectly safe as the > > current cannot "run away" because of the current limiting effect of the > > regulator diode. > > > > These devices are not widely used so they are not available from many > > sources such as Radio Shack. One source that sells them is Mouser > > Electronics. Go to www.mouser.com and search for the part # 1N5297 and > you > > will see the information. When I checked recently, they had about 1,500 > of > > them in stock for a price of $4.29 each. I suppose they have a minimum > > order, so it would be a good idea for someone to volunteer to order a > batch > > of them for those that express an interest in a group buy. (I don't have > > time to do this - sorry). > > > > I believe the use of a 1N5297 along with a few nine-volt batteries is by > far > > simplest, goof-proof way to make a constant current CS generator. If you > > give it a try, please let us know how your results. > > > > --Steve Young > > > > > > > > > > > > -- > > The silver-list is a moderated forum for discussion of colloidal silver. > > > > Instructions for unsubscribing may be found at: http://silverlist.org > > > > To post, address your message to: [email protected] > > > > Silver-list archive: http://escribe.com/health/thesilverlist/index.html > > > > List maintainer: Mike Devour <[email protected]> > > > > > > > >
