On Tue, 4 Nov 2008 16:12:46 +1030 "Neville" <nevillem...@bigpond.com> wrote:
> > I've done it again, I meant to say AC/DC converter, if that's > what a wall wart is then that's it indi. > I'm pretty sure you are referring to a "wall wart" power supply. > > -That gives me something to work on, thanks. That's a common old > volume control knob or rheostat isn't it? Yes, that's the one. Usually called a potentiometer or a variable resistor. > Yeah, I may just play > around with one of those and have a go at that, what with my 'skills' > in electronics <g> I shouldn't have too much trouble hooking up a > multimeter to check voltage at different settings or positions. Just > had a thought, if I can find a counter of some sort I can just stick > a match or something to one of the fan blades and hold the counter to > it and find out that way, well dependant on how hard the counter > 'clicks' around that is. Good thinking 99. [BTW, you may find the > torque required to move an object through liquid to be too much for > that kind of motor, but I could be wrong about that. Shaft balance is > a big deal for the bearings, too.] -Nah, they work fine indi, I've > made several using the magnet out of the hard drive and the fan as > the stirrer motor. I think the lowest setting on the adapter I have > is 3.5v which is not enough, (you're sort of half right there), the > lowest which works is 4.5v. Now I just use a straight 9.3v one. > There's a lot of talk about stirring speeds but I'm happy with 9.3v, > besides I haven't got the patience for weeks of testing various > voltages anyway so I put the variable one back in the draw, may play > around with voltage, (for spinning speed), again one day though and > take some notes on resultant solutions. The tricky bit is locating > the magnet central on the fan so the fan doesn't self destruct over > time cos of excess wobble, (which would be your 'big deal' concerning > the bearings), I've been using one now for around 8-10 months and is > still an excellent magnetic stirrer, hasn't self destructed yet. > I've been checking out speaker magnets to see if they would work also > cos they are round, but the speakers I have ripped apart have magnets > which I think are too thick, the hard drive ones are thin but have a > very strong magnetic field. > I'm impressed. Sounds like you have native talent at tinkering with electromechanical gadgets. Maybe you should take some photos and put them online. Cheers, indi -- 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: silver-list@eskimo.com Address Off-Topic messages to: silver-off-topic-l...@eskimo.com The Silver List and Off Topic List archives are currently down... List maintainer: Mike Devour <mdev...@eskimo.com>
