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Flight by light
Solar/Glow in the dark/windmill powered fire fly decoration for trees | |
The artificial fire fly would be made of glow - in - the - dark
material, have windmill shaped wings to rotate in the wind -
creating a bit of power to light them and also have a solar
panel. All three things might just make them glow a little come
dark.
Hang from trees around the garden.
Wind resource evaluation
http://www.awea.org/faq/basicwr.html
Wind power density measurement. [pottedstu, May 08 2002, last modified Oct 04 2004]
[link]
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My design is smaller than a golf ball, ulness we are talking
about midgets, I don't think they would hurt. |
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Maybe a neat spinoff of the technology would be wireless wind-powered christmas lights. I hate trying to get the strings unknotted every year. |
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Apparently an average wind speed of 12.5 mph gives 200 Watts per square metre. I think this is quite high for average wind speed, and about the minimum for commercial wind power generators. |
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A golf-ball sized device would have cross-section of around 10 square centimetres, giving 0.2 W if all the wind's power could be converted to electricity. |
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A quick look at the Toshiba website suggests a typical red LED has power consumption of 0.075 W. |
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So with a suitably efficient generator, this *might* be possible, but someone with more knowledge of these things would need to check. |
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presuming these were all-weather things, the solar panel would mean they could charge a battery all day, and only need the wind-power for supplementary power. |
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Which is just as well, as one red LED isn't really very bright at all - In fact, why not make them bright enough to be useful for more than decoration? My parent's garden path is dark and treacherous... |
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yamahito, solar garden path lighting is commonly available. |
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While searching about, I discovered a company that manufactures solar-charged pool/pond floating lights in different colo(u)rs. Nice idea. No pix, though, or I would have linked. |
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