• Lazyweb I want a solar powered USB jack

    by  • February 19, 2008 • Cool Tools • 3 Comments

    Simple: a solar panel, 2.5W, output 5V and 500 mA, with a USB jack attached. In sun, you plug your USB device (ipod, phone etc) into the solar-powered USB jack, and it charges.

    Pure, simple. Who’s got it?

    http://www.rei.com/product/770230 – $115 == $40 a watt, that’s Not Right.

    http://www.modernoutpost.com/gear/details/sf_solar_uno_slim.php – another candidate, fifty dollars, much closer… but still, $20 a watt… that’s Not Right either.

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    Vinay Gupta is a consultant on disaster relief and risk management.


    3 Responses to Lazyweb I want a solar powered USB jack

    1. February 20, 2008 at 4:00 am

      I think the tricky bit is in taking the wildly unpredictable output from the PV panel and regulating it before it gets to the USB device.

    2. February 20, 2008 at 7:50 am

      Hm. Point. I guess an inline voltage regulator? Although when the panel is producing a lot of energy, all the regulator is going to be doing is throwing away volts…

      I guess this is why most of these devices seem to buffer with batteries…

      Hm. Thoughts?

    3. February 20, 2008 at 2:13 pm

      Check this out:

      Use your shirt to recharge your cell phone or iPod.

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