Constant current still depends on current 'draw' and will ramp up to the limit just like not using the circuit. It will go under 1 ma, just not over 1 ma. The LED never gets 'very' bright but it will be dimmer in better water. A standard 20 milliamp max LED does just fine. If the water pulls 1 ma at the beginning... and the electrodes aren't right next to each other, it's probably no good. Ode
At 09:02 AM 6/25/2004 -0500, you wrote: >Morning Dave, > > >> current to just under 1ma, but if you change the value of R1, you should be >>able to set the current to what you like (within reason!). > > Nice circuit, nice drawing. One question. > > Have you checked the brilliance of the LED at that low current? Likely >some of the smaller ones will work fine. > > I would like to point out the disadvantages of the constant >current. Using constant current, the LED will not serve as a visual >indicator of current flow which allows the rejection of inferior water. > > I realize this is not important to many, but it is to me, because I have >found so much junk distilled water. >Plus I am in the habit of doing it, my eye is trained, but I am not close >minded. > >So, the best of both worlds..... build a nice unit with a switch. This >would allow the use of constant current and NON-constant current when needed. > >Wayne > > > >-- >The Silver List is a moderated forum for discussing Colloidal Silver. > >Instructions for unsubscribing are posted at: http://silverlist.org > >To post, address your message to: [email protected] >Silver List archive: http://escribe.com/health/thesilverlist/index.html > >Address Off-Topic messages to: [email protected] >OT Archive: http://escribe.com/health/silverofftopiclist/index.html > >List maintainer: Mike Devour <[email protected]> > >
