Bill and intrepid colloiders, I saw a clever use of a 5v regulator 7805 to limit current to 20mA in a cs circuit.Basically,it had input connected to the +ve(36v?),and the output through a 250 ohm resistor to the gnd terminal.This terminal then connected to the silver electrode. So,the 5v regulator was limiting the cs generating circuit-a series limiter if you like. I see no reason why anyone couldn't use a 1k resistor in exactly the same manner to limit circuit current to 5mA.Info courtesy Frank Matzka. petemc -----Original Message----- From: Bill Kingsbury <[email protected]> To: [email protected] <[email protected]> Date: Tuesday, 14 July 1998 9:22 Subject: Re: An observation...
> >Chuck, > >Thanks for clarifying the purposes of the bulb. The basic >question, however, is still looking for an answer: > >>> Does anyone know how to design a 5 mA current regulator ? >>> (Any references or ideas appreciated.) > >As Mike wrote: > >>> ...it makes sense to try current limiting at something below >>> that at which the descending cloud of darker particles is seen. >>> That's what I would try. >>> >>> I've long thought that current limiting schemes of various sort >>> would emerge as the best strategy once we start to really study >>> the process. > >Any clues ? > >--Bill > > >At 11:21 AM 7-13-98 -0700, Chuck wrote: >> >>This is Marsha's husband replying. My name is Chuck Hallett and my >>profession is Electrical Engineering. I am writing to hopefully describe >>the purpose of the light bulb in the silver generator circuit. >> >>The primary purpose of the bulb is to limit current in the event the >>electrodes touch each other (short circuit). >> >>When the wires touch, or your alligator clips touch, the current in the >>batteries and the wires is limited only by the internal resistance of the >>batteries and the connecting wires. Electrical Current generates heat. >>Lots of current generates lots of heat. Try this, take a single >nine volt >>battery (a used but not totally dead one) and connect a spare >alligator clip >>lead to each terminal. You should notice the wire getting anything from >>warm to hot enough to melt the insulation. >> >>The bulb limits the current to 40 milliamps which is a reasonable >amount of >>current for the battery circuit, and far below what the colloidal silver >>process will use. >> >>If the leads short together, at best, your batteries ($4.95 retail each) >>will quickly discharge and you'll be out buying new ones. At worst >the heat >>generated could cause the wires to melt, and at an extreme, cause a fire. >> >>Why a 28 volt 40 milliamp lamp? Answer: Economies of supply. >> >>28 volts because we don't want the bult to burn out if we short the wires >>together. When this happens all you've done is closed the switch on >what is >>now the equivalent of a flashlight. If a smaller voltage bulb >were used, >>it would glow very brightly for a short period of time and burn >out. Then >>it would act like a blown fuse, i.e. no silver generation until replaced >>with a new bulb. >> >>40 milliamps because it is a reasonable limiting value for the >circuit and >>more importantly it is a commonly available bulb (at Radio Shack anyway). >>Just like the light bulbs you put in your lamps, these small lamps >come in >>standard sizes. You can get different sizes which would work, but >they are >>harder to get and much more expensive. >> >>Lastly the bulb serves as a battery condition indicator. >> >>The bulb serves no purpose in the silver generation process, it is only >>there for the reasons stated, and you can make a perfectly functioning >>generator without the bulb, by connecting the silver electrodes >directly to >>the batteries. You just run the risk of running your batteries down >>quickly. If you are worried about a fire, either make sure nothing >>combustible is near the batteries & wire, or don't do it. >> >>I hope this sheds some light (pun intended) on the situation. Direct all >>flames to me at [email protected] > >>-----Original Message----- >>From: Bill Kingsbury <[email protected]> >>To: [email protected] <[email protected]> >>Date: Monday, July 13, 1998 9:27 AM >>Subject: Re: An observation... >> >> >>> >>>I read that the 40 mA bulb was used to limit the current to >>>40 mA maximum -- and lower currents would be desirable, (if >>>smaller bulbs were available) to minimize colloidal particle size. >>> >>>George's current is no where near 40 mA, and the results seem >>>to be compromised or questionable, already (at 36 vdc). >>> >>>Does anyone know how to design a 5 mA current regulator ? >>>(Any references or ideas appreciated.) >>> >>>Or, could one use 6 vdc, and keep a batch running 24 hours a day >>>(in a dark place) ? >>> >>>--Bill >>> >>> >>> >>>At 10:10 AM 7-13-98 -5, Mike D. wrote: >>>> >>>>On 13 Jul 98 at 22:15, George Martin wrote: >>>> >>>>> When the current read 8.0 - 10.0 ma >>>>> I noticed something different occur. In addition to the CS >>>>> 'floating' around in the vicinity of the electrodes there was >>>>> also a rather thick 'stream' of CS that was sinking to the >>>>> bottom of the container. >>>> >>>>Hello George, >>>> >>>>Excellent set of observations. Your setup is very similar to mine. >>>>I see the same effect at about the same current. >>>> >>>>I wonder if those are larger particles. A long time ago Rose used a >>>>microscope at work to look at some CS I made that was run for a long >>>>time (different apparatus and recipe than I'm using now). She saw >>>>much larger particles mixed with the almost invisible smaller ones. >>>> >>>>Above a certain current, some people have talked about "burning" the >>>>silver particles. I doubt that's a proper description, but it conveys >>>>the notion that the particles made are different. >>>> >>>>So it makes sense to try current limiting at something below that at >>>>which the descending cloud of darker particles is seen. That's what I >>>>would try. >>>> >>>>I've long thought that current limiting schemes of various sort would >>>>emerge as the best strategy once we start to really study the >>>>process. I've also wondered if there is a calculable property that >>>>would let you predict that threshold level, such as current density >>>>(current flow vs. surface area of electrodes). You're welcome to try >>>>the experiments. >>>> >>>>Be well, >>>> >>>>Mike D. >>>> > > >-- >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] > >List maintainer: Mike Devour <[email protected]> > -- 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] List maintainer: Mike Devour <[email protected]>
