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Students make sewing machine operated cellphone charger
Shibin, Derek & Brian, researchers from UCSD, have developed a sewing machine operated cellphone charger (really cheap I am guessing) during their Internship in Mumbai. In their words "We don't know if this will ever get out of the lab, but we do know that there is a footpowered sewing machine in nearly every village in India, that there is a lot of unmet demand for electricity, people can charge Rs5 per charge, and that the poverty line in India is Rs10. " They have blog of their sewing machine project here.
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ameetdesh
I am doctoral student at UC San Diego. I am interested in Economics and role of appropriate Technology in development and education. With the internet, the world has become a small place, with best practices in various fields accessible at mouseclick. In future I would like to play such rolw of a cr.....read more
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In concept, the idea is parallel to the Pedal Power generator http://www.editthis.info/mozda_converter/Main_Page Ofcourse, the level of power generated in the two cases being very different. Some questions for the designers (Shibin et al):
1. How much power can the sewing machine generate?
2. Is it possible to charge rechargeable batteries (1.5V or higher) with that?
I corresponded with Derek, and came to know that, right now power is 2-4W, and batteries can be charged. Just that, in this basic ckt, output is fixed at 5V and can support upto 350mA. They are working on efficiency & output power so that more than one cellphone can be charged. Their target is 7.5W charger, for an attractive economic case.
Another piece of related news on generating electricity while spinning khadi: http://www.igovernment.in/site/now-e-charkha-to-spin-khadi-in-india.
[I wish the iGovernment folks would start putting in links to the source of their articles]
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