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Great reference from Joel Murphy of circuits and diagrams for solar engines.

Interesting read. "In Senegal, the high levels of insolation afford the ideal prerequisite for the installation of photovoltaic systems to provide direct access to electricity or maintain a reliable energy supply as decentralized stand-alone solutions."

Probably overkill, but it'll let people charge their cellphones too!

These panels seem to be able to capture up to 90% of the photons and are actually cheaper than the regular ones...

I saw Sheila Kennedy and Frano Violich give a presentation at the Kalil awards last week. Amazing work in interactive architecture. Be sure to check out their "Portable Light Project" (under Projects/Intelligent Infrastructure). Renewable power and light source that can be sewn into traditional garments.