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We have just such an exhibit, and our motor has run well for 6-7 years. 
 It was built by a volunteer, who got the motor from
Jade Mountain Inc, Boulder Colorado  303-449-6601.  They seem to have 
become part of Realgoods.com, but the guy there thought they could still 
get them (GN108 5A permanent magnet DC generator, was $200)

A radio is fun to add (we just hot-wired to 9V battery terminals). 
 We've got a couple of different bulbs too- incandescent (12v from 
McMaster) and fluorescent (Coleman makes them now for camping);  the 
fluorescent takes a lot less cranking, so makes a nice example of energy 
costs.

Kathy Krafft
Sciencenter
Ithaca, NY


William Katzman wrote:

> Hello everyone! 
> We are looking to re-create a hand-cranked electrical generator for an 
> exhibit.  So what I'm looking for is a 12 Volt motor that people have 
> used successfully on the floor as an electrical generator.  So if 
> anyone out there uses a standard motor as a generator, I would love to 
> know the model and make of it (if it's successful).  And if you have a 
> warning of which motors to stay away from then let me know that as 
> well.  Thanks!
>
>  
> The specifics on our project:  essentially we have one 12 Volt motor 
> (that is no longer made) that generates electricity for a 12 Volt 
> light, a 12 Volt T.V.. and a 12 Volt fan.  We want to couple this with 
> another 12 Volt motor (in parallel) so that two people can combine 
> their work and we'll include a couple more options on what to power.
>
> -William
>
>
> William Katzman                 [log in to unmask]
> Director of Exhibits                    (828) 322-8169 x307
> Catawba Science Center          (828) 322-1585 (fax)
> "Try not to become a man of success, but rather to become a man of 
> value" -A. Einstein
>
>

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