ISEN-ASTC-L is a service of the Association of Science-Technology Centers Incorporated, a worldwide network of science museums and related institutions. ***************************************************************************** Dan, I don't know if this will help but about 7 years ago we used a generator from WindStream Power in an exhibit for a children's museum, and it's still going strong. They have many different sizes. The one we chose was a model they hand mounted to be foot-cranked. That one might be too large for your application. We modified it to be hand-cranked, figuring if it could take being cranked with leg power, it might last a while longer in a children's museum being cranked by hand. As far as I know it has held up. There's a possibility it was replaced once over that time. http://www.windstreampower.com/ Best wishes, Joe R. On 3/8/2013 8:32 PM, Dan Zevin wrote: > ISEN-ASTC-L is a service of the Association of Science-Technology Centers > Incorporated, a worldwide network of science museums and related institutions. > ***************************************************************************** > > Greetings, > > We're looking for a robust yet small, lightweight hand crank generator that can withstand a lot of use by teenagers. This one gave us about 20 hours of use before the small handle snapped off: http://www.k-tor.com/hand-crank-generator/ > > The crank needs to output at least 10W of power. > > If you've got suggestions for something better, we'd love to know about them! > > Thanks, > > Dan > > **************************** > Dan Zevin > Public Education Specialist > Space Sciences Laboratory > 7 Gauss Way, MC 7450 > University of California, Berkeley > Berkeley, CA 94720-7450 > > (510) 642-8326 > (510) 643-5660 [fax] > [log in to unmask] > http://cse.ssl.berkeley.edu *********************************************************************** For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org. Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org. The ISEN-ASTC-L email list is powered by LISTSERVR software from L-Soft. To learn more, visit http://www.lsoft.com/LISTSERV-powered.html. To remove your e-mail address from the ISEN-ASTC-L list, send the message SIGNOFF ISEN-ASTC-L in the BODY of a message to [log in to unmask]