On Sun, 14 Aug 2005 11:12:34 -0700, "Watson A.Name - \"Watt Sun, the
Dark Remover\"" <NOSPAM@dslextreme.com> wrote:

Snipped

Interesting links


The generator puts out about 90VAC at about 20 Hz, depending on how
fast it's cranked. It's bridged across the phone line and when
cranked, a switch engages and connects the rotor to the line. Just
a few magnets and a armature with wire and slip rings.

I'll bet mine has a set of weak magnets. We were having a contest to
see who could get the bulb to light the brightest, in the lab - that's
where the 100 HZ came from. I imagine that they used some iron pole
pieces for the magnet and it would lose flux over the years.

Sometime I'll have to hunt for it and see what some rare earth magnets
can do.

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default@defaulter.net

My cat could give you more information that I can - sadly (and I still
feel bad about it) I connected one lead from one of these to a metal
plate, and the other lead to a saucepan of milk - cat stood on the plate
and started drinking the milk - I wizzed the handle and he jumped

Had this cat that insisted on climbing through the window. It was a

A print for this unit, as far as I'm concerned, is not in cyberspace.
Schematics abound showing the phone circuits but, keeping in mind the
fact that this assembly is vintage analog and omitting the phone
circuitry, I have determined from descriptions by Watson and default
that what we have left is basically an unorthodox P.M.G.

What I was trying to uncover was why the waveform is not sineusoidal.
I'll take a stab at that too.

I think that the reason is because of the horseshoe magnets providing
the magnetic field. The highest concentration of flux is at the poles
of the magnets and does not follow the arc of the rotor coils. When the
rotor coils are at 90' to the plane of the horseshoe poles, the coils
aren't cutting lines of flux, they are running with them.

rg

My cat could give you more information that I can - sadly (and I still
feel bad about it) I connected one lead from one of these to a metal
plate, and the other lead to a saucepan of milk - cat stood on the
plate and started drinking the milk - I wizzed the handle and he
jumped

David - who doesn't feel bad though about all the local kids he talked
into holding the leads from his genny

quietguy@REMOVE-TO-REPLYconfidential-counselling.com

I agree. I think this unit will remain in the realm of novelty however,
raising worms is justification enough to keep one handy;-)

I read that the Military has adapted it, in a handheld version, to
charging high tech-low voltage DC field equipment such as PDAs', cell
phones and, If I read correctly, 12 volt batteries.

Thanks,

rg

I share the curiosity about how modern high power magnets would perform
instead of the horseshoes. The best application I can think of at this
time is to boost charge a weak car battery, anywhere! I would have one
in my trunk dedicated to that function.

rg

Watson A.Name - "Watt Sun, the Dark Remover" wrote:

snip


I took a hard disk drive apart and removed the platters. I connected
a red LED the leads of the heads that go to the voice coil. When I
wiggled the voice coil back and forth in that strong magnetic field,
it lit the LED, easily. Also, some of the HDD motors are permanent
magnet and when spun will light the LED.
NOSPAM@dslextreme.com

I ran across a site a while back, can't remember where, whose author
was selling used magnets he gleaned from hard drives and claimed they
were Neo's. I was skeptical because of storage media in a computer but,
it appears he may have been correct.

Some related sites with pedal power outputs

http://www.los-gatos.ca.us/davidbu/pedgen.html
Burst output: 25 amps at 17 volts (425 Watts)
30 minute average output (back when I was in shape) 150 Watts

http://www.ibiblio.org/pub/academic/environment/alternative-energy/energy-resources/homepower-magazine/archives/23/hp23p48.txt
A modestly fit person can expect to
generate about one tenth horsepower (roughly 70 watts) for a brief
period.

I ran across a site a while back, can't remember where, whose author
was selling used magnets he gleaned from hard drives and claimed they
were Neo's. I was skeptical because of storage media in a computer but,
it appears he may have been correct.


The part of the motor armature that's between the magnets and the
media is soft iron and "shorts out" the magnetic field. Kinda like
the E-core around a relay coil.

Cheers!
Rich

On Tue, 16 Aug 2005 21:14:37 -0400, default wrote:

Some related sites with pedal power outputs

http://www.los-gatos.ca.us/davidbu/pedgen.html
Burst output: 25 amps at 17 volts (425 Watts)
30 minute average output (back when I was in shape) 150 Watts

http://www.ibiblio.org/pub/academic/environment/alternative-energy/energy-resources/homepower-magazine/archives/23/hp23p48.txt
A modestly fit person can expect to
generate about one tenth horsepower (roughly 70 watts) for a brief
period.

I'd like to take exception to this number here. You produce almost 70
watts just sitting there! (albeit, in the form of heat and not real
useful.)

When I was in HS physics, the class got around to the F+MA and all
that stuff, and did an experiment to determine just how much power
a person can generate. There was a 3-floor stairwell at this school,
and what the physics class did was get a few boys to volunteer to
run up the stairs as fast as they could, and be timed. Then, of
course, the boy's mass times the height, with some gravity factor
was the work done,divided by the time it took him to ascend 30 ft.
(10 M) of stairs gives power, the rate of doing work. These guys
were pushing a horsepower. But you were allowed to cheat - use
the handrail, vault instead of turn the corner, whatever. I tried
it and made about 300 watts, IIRC.

I'm not about to argue with you. A person "can" generate a horsepower