Hand crank generators?
Ms R in Colorado
high school demos of electricity? You know, the kinds that have a little hand
crank and some big bar magnets around a coil?
I'd also like to find one of those old army surplus field telephone hand
crank generators, like this one? http://dimensional.com/~melissa/generatr.jpg
--
- Melissa in Colorado, USA.
Al
In article <3ce9cb49$1...@omega.dimensional.com>, Ms R in Colorado
<M...@NOoSPAM.COM> wrote:
Go to http://www.scientificsonline.com/ and search on "generator."
Al
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Remove * from the address to reply.
k.t.chan
Geoffrey G. Rochat
use for
>high school demos of electricity? You know, the kinds that have a
little hand
>crank and some big bar magnets around a coil?
Try Surplus Sales of Nebraska (www.surplussales.com) or Fair Radio
(www.fairradio.com) . They're surplus goods, not kits, but they may do.
legg
wrote:
>Does anyone make a little 150 VAC hand crank generator kit, like they use for
You could always stick your own handle on some simpler motor shafts.
RL
Tim Shoppa
> Does anyone make a little 150 VAC hand crank generator kit, like they use for
> high school demos of electricity? You know, the kinds that have a little hand
> crank and some big bar magnets around a coil?
Depending on exactly where you are, you might check around magneto repair
shops or farm equipment dealerships for magneto parts. They aren't exactly
the same as the hand crank generators you're looking for, but they aren't
too far off either.
Less towards "kits" and more towards "assembled units", see
http://castlewood1.com/electric1.html
They've got some really cool Wimhurst machines.
Tim.
Brian Folk
microwave oven and open it up and take that motor out!!! it isnt very big
and it puts out about 130-150volts. At about 2watts. I found this out by
mistake and shocking myself :) But then realized i could take it to school
and shock some of my friends :) Oh well, but the motor works perfectly as a
generator. And ive had a few of them and they all work great!!!
"Ms R in Colorado" <M...@NOoSPAM.COM> wrote in message
news:3ce9cb49$1...@omega.dimensional.com...
Lizard Blizzard
"Geoffrey G. Rochat" wrote:
I found it http://www.surplussales.com/specials/specials-2.html but it's
$45 which is a bit steep for such a simple thing.
Lizard Blizzard
Tim Shoppa wrote:
[snip]
> Depending on exactly where you are, you might check around magneto repair
> shops or farm equipment dealerships for magneto parts. They aren't exactly
> the same as the hand crank generators you're looking for, but they aren't
> too far off either.
Yeah, right. Magnetos generate a nice fat spark like for an ignition,
not 100VAC at 20 Hz.
> Less towards "kits" and more towards "assembled units", see
> http://castlewood1.com/electric1.html
> They've got some really cool Wimhurst machines.
He didn't ask for high voltage!
> Tim.
John Hall
>Does anyone make a little 150 VAC hand crank generator kit,
>like they use for high school demos of electricity?
>You know, the kinds that have a little hand
>crank and some big bar magnets around a coil?
Not 150v, but there are several hand-cranked radios available in the
past few years.
In the original, the Baylis(?) Freeplay, the crank winds a spring,
which turns the generator when power is required. These cost about
US$70 IIRC, or $20 to the poor in Africa (us rich North Americans
subsidise the poor, who really NEED these things. Great Idea - I
bought 2).
They also have a torch (aka lantern/flashlight), in which cranking
winds the spring. This is then used to power the light directly, or to
charge a battery, enabling you to store several springs-worth.
Then there was a Sony. Don't know any details.
Recently Grundig has a (Made in China) FR-200, in which cranking
charges a Ni MH battery. These are quite inexpensive (Cdn$40)
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John W Hall <wweexxss...@telusplanet.net>
Calgary, Alberta, Canada.
"Helping People Prosper in the Information Age"
ANONYMOUS
from news:afjay*-21050209...@192.168.1.2:
That one is 10 Volts.
Ms R, in Colorado
saying from news:3CEA5641...@hk.gin.net:
> Like this http://www.pacificsites.com/~brooke/Images/G8A.jpg
Uh, no dear, a little large for me. Like I said, I was looking for one like
this?: http://dimensional.com/~melissa/generatr.jpg
--
- Ms R, Colorado, USA.
Lizard Blizzard
> >Does anyone make a little 150 VAC hand crank generator kit,
> >like they use for high school demos of electricity?
> >You know, the kinds that have a little hand
> >crank and some big bar magnets around a coil?
> Not 150v, but there are several hand-cranked radios available in the
> past few years.
> In the original, the Baylis(?) Freeplay, the crank winds a spring,
> which turns the generator when power is required. These cost about
> US$70 IIRC, or $20 to the poor in Africa (us rich North Americans
> subsidise the poor, who really NEED these things. Great Idea - I
> bought 2).
> They also have a torch (aka lantern/flashlight), in which cranking
> winds the spring. This is then used to power the light directly, or to
> charge a battery, enabling you to store several springs-worth.
Have you ever seen the flashlight that is powered by shaking it? It has
a powerful magnet that flies back and forth across a coil, and that
charges up the capacitor or battery(?) for several tens of minutes of
light. See http://ledmuseum.att.net for reviews of lotsa different LED
flashlights including this one.
Lizard Blizzard
Another way of doing this, and maybe cheaper, is to connect a bicycle
dynamo that puts out 6 or 12VAC to a 1210VAC to 12VDC power transformer
turned backwards. So the 12V secondary connects to the dynamo, and the
120VAC winding puts out some real surprises if you touch it.
Ms R, in Colorado
saying from news:3CEAD9E7...@rsccd.org:
Was your handle "Rube Goldberg"? :-)
Ms R, in Colorado
True, but they ARE getting hard to come by.
Al
<ANON...@ANONYMOUS.COM> wrote:
Why do you need that exact voltage and form factor? Are you trying to
restore an old telephone? Do you want to use it for a demo in school? If
it's for school, the high voltage will be a liability.
We have to be careful, our little darlings will kill each other with 150 Vac.
That's why the catalog for the kiddies has low power/voltage/current goodies.
I do have exactly what you want, but I bought it as "new surplus" in the
late sixties for about 5 bucks. It certainly is worth 45 bucks now. And it
is not a simple device as some think.
My device was made by "FTR," an unknown company to me. It's marked
GA-2857-14-3 and G-25A/PT. It has two QC stamps on it. I'm sure it was made
to mil. specs. It is hermitically sealed and has an anti-fungal/corrosion
coating on the aluminium body, which appears to be a deep-drawn can. It
still works and puts out a peak of about 125 Vac when cranked vigoursly.
Lizard Blizzard
Al wrote:
[snip]
> My device was made by "FTR," an unknown company to me. It's marked
> GA-2857-14-3 and G-25A/PT. It has two QC stamps on it. I'm sure it was made
> to mil. specs. It is hermitically sealed and has an anti-fungal/corrosion
> coating on the aluminium body, which appears to be a deep-drawn can. It
> still works and puts out a peak of about 125 Vac when cranked vigoursly.
> Al
I had a similar one that I connected a 120VAC 3W lamp and taped the lamp
to its side. The lamp was one of those that you see in the old HP 200
tube Wien Bridge Oscillators in the negative feedback loop. I could
crank it and get the light to light up, but not brightly. It could put
a 'tingle' in your fingers if you weren't careful.
> --
John Hudak
output? Your pic (to me) does not convey either.
John
Watson A.Name
says...
> Err...well you kinda ought to define 'large'...physical size? power
> output? Your pic (to me) does not convey either.
The old hand crank generators found in the wall telephones were
roughly a 4 to 6 inch cube. The hand crank generator from a field
phone is a cylinder about 2 inches in diameter and 3 inches long,
substantially smaller than the old ones.
> John
>
>
> "Ms R, in Colorado" wrote:
> >
> > "k.t.chan" <ktc...@hk.gin.net> bestowed such eternal wisdom upon us by
> > saying from news:3CEA5641...@hk.gin.net:
> >
> > > Like this http://www.pacificsites.com/~brooke/Images/G8A.jpg
> >
> > Uh, no dear, a little large for me. Like I said, I was looking for one like
> > this?: http://dimensional.com/~melissa/generatr.jpg
> >
> > --
> > - Ms R, Colorado, USA.
>
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will do more than tingle you. Can be used to bring nightcrawlers to the surface or used to bring fish to the top of the water.
Bill Beaty
> Does anyone make a little 150 VAC hand crank generator kit, like they use for
> high school demos of electricity?
telephone magneto
For classrooms, hand-crank generators are six volts DC. Everyone is terrified of lawsuits. No way would any company sell a 150V generator for schools. The most popular low-volt model is "Genecon" from Arbor Sci. and others, but $60 pricey:
http://www.arborsci.com/hand-crank-generator-accessories
Other models:
http://www.miniscience.com/projects/KITWG/
Generator kit w/cow magnet</a> $25, or $20 class pak
http://www.amazon.com/Dowling-Magnets-Electric-Generator-Discovery/dp/B0006O8RA0
Science kit generator, Dowling Magnets $26
http://www.freelights.co.uk/kit.html
Freelights bicycle gen kit (UK)</a>
http://www.amazon.com/Thames-Kosmos-555003-Electric-Generator/dp/B003KZ0Q5G
Science kit generator, Thames Kosmos $39
http://www.amazon.com/Elenco-Electronic-Motor-Generator-Action/dp/B000IXPYS2
Elenco Motor & Generator kit $35
http://www.amazon.com/Green-Science-Windmill-Generator-Toysmith/dp/B0016PBH9Q
Windmill Electric Generator $12
http://www.amazon.com/American-Educational-7-1853-Generator-Length/dp/B00657NH7K
Am. Edu. classroom handcrank generator $17
http://www.amazon.com/Pacific-Science-Supplies-Inc-Generator/dp/B001DI6PSO
PSS classroom handcrank generator $15
http://www.amazon.com/HyMini-Hand-Crank-Generator/dp/B002MXT8A6
HyMini 6Vdc 0.2Amp crank generator (not transparent) $12
boB
<bi...@eskimo.com> wrote:
>On Monday, May 20, 2002 at 9:21:29 PM UTC-7, Ms R in Colorado wrote:
>> Does anyone make a little 150 VAC hand crank generator kit, like they use for
>> high school demos of electricity?
>
>No, not anymore. You can find old ones on eBay, search for:
>
>telephone magneto
>
>For classrooms, hand-crank generators are six volts DC. Everyone is terrified of lawsuits.
department get rid of their Tesla Coil for the same reason.
boB
DecadentLinuxUserNumeroUno
> On Mon, 22 Feb 2016 17:44:31 -0800 (PST), Bill Beaty <bi...@eskimo.com>
> wrote:
>
>>On Monday, May 20, 2002 at 9:21:29 PM UTC-7, Ms R in Colorado wrote:
>>> Does anyone make a little 150 VAC hand crank generator kit, like they
>>> use for high school demos of electricity?
>>
>>No, not anymore. You can find old ones on eBay, search for:
>>
>>telephone magneto
>>
>>For classrooms, hand-crank generators are six volts DC. Everyone is
>>terrified of lawsuits.
>
>
> Western U in Bellingham WA also made the eletrical engineering
> department get rid of their Tesla Coil for the same reason.
>
I dubbed as a lie detector. It was essentially a car coil and a 1.5 volt
battery and two 1/2" x 3" steel rods at the end of the wires.
Of course it was merely a shock box, but I called it a Lie Detector and
had quite a few fathers tell me their age as I shocked them and said that
"the machine says you are lying". I thought it was quite hilarious at the
time. Not many pacemakers around yet. It was fun and funny as hell.
Bill Beaty
>
> Other models:
>
Did I miss any? I'm keeping a list of 'em on coilgen. (Heh, should add an eBay search link for crank telephone magnetos.)
Martin Brown
> On Monday, May 20, 2002 at 9:21:29 PM UTC-7, Ms R in Colorado wrote:
>> Does anyone make a little 150 VAC hand crank generator kit, like they use for
>> high school demos of electricity?
>
> No, not anymore. You can find old ones on eBay, search for:
>
> telephone magneto
>
> For classrooms, hand-crank generators are six volts DC. Everyone is terrified of lawsuits.
> No way would any company sell a 150V generator for schools.
> The most popular low-volt model is "Genecon" from Arbor Sci. and
others, but $60 pricey:
>
> http://www.arborsci.com/hand-crank-generator-accessories
of CDs to form a largish drive pulley and a rubber band. Stepper motors
out of defunct printers can be repurposed this way.
Easily enough to drive a couple of high brightness LEDs.
The other way is a coil and Nd magnets stuck to a CD.
Both are things the children could build for themselves under guidance.
(or your lab tech could make for next to nothing)
--
Regards,
Martin Brown
Jasen Betts
>> For classrooms, hand-crank generators are six volts DC. Everyone is terrified of lawsuits.
> > No way would any company sell a 150V generator for schools.
> > The most popular low-volt model is "Genecon" from Arbor Sci. and
> others, but $60 pricey:
>>
>> http://www.arborsci.com/hand-crank-generator-accessories
>
> It is easier to make one from a simple motor with a pulley on a couple
> of CDs to form a largish drive pulley and a rubber band. Stepper motors
> out of defunct printers can be repurposed this way.
on-line, it'll light LEDs, but doesn't seem like a very practical
charger.
If you want more voltage the platter motor in many microwave ovens runs
at line voltage and can produce hundereds of volts if turned by hand.
if you want to buy new look for a synchronous gear-motor with single-digit
RPM.
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