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An mp3 player (would probably have to be solid-state storage for power concerns) that has a kinetic battery charger built in. As the user walks the inertial energy is transfered to a generator and then to a storage device. While the power requirements would probably make it difficult for this to completely
power the device, It could act as a way to improve the play time on a single charge of the original battery.
Solar powered MP3 player
http://www.treehugg...solar_powered_m.php
Solar powered MP3 player (one of many) [csea, Jul 07 2007]
Shakable MP3 Player
http://www.nytimes....7dcf7ef3396&ei=5070
Shake the MP3 Player to change tracks [csea, Jul 07 2007]
Human Powered MP3 Player Research
http://campus.io.tu...f97/doc/kuipers.pdf
Cranking seems best [csea, Jul 07 2007]
Annotation:
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Jogging would produce even more energy but then a jog usually isn't as extensive time-wise as a hike can be. Just as long as the mechanism isn't too heavy. |
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They use kinetic capture mechanisms in watches all the time, so it should not be that heavy... |
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But to collect more energy, like the amount needed to create the vibrations in the headphones, would take a substantially larger device. |
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True, but as photojunkie says, this would extend battery life rather than replace the battery. |
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Or in the heels of your shoes. Or piezoelectric blah blah blah . . . . |
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But who jogs for more than 7 hours anyway? |
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I was thinking of exactly the same thing yesterday, in work I have my mp3 player on a cord round my neck and I noticed it was swinging when I was walking round the warehouse. I thought it would be so good if this thing had a kinetic charger in it then it could be charging the battery whilst I'm walking, and with it being MP3 it doesn't use much more electric than a digital watch does, a solar powered MP3 player would probably also work fine. |
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That Sandisk "Shaker" isn't shake-powered. It has a battery in it--the shaking controls the song mix. |
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Ah! Right your are. I should have read a bit more: |
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"After all, the idea of shaking something to mix up the contents — in this case a music playlist — is something even a baby can understand." |
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Link title corrected. Also came across a study that seems to say that shaking isn't an ideal power source for an MP3 player; they favor cranking. [link] |
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Should be quite bakeable, especially for flash-ram units as they use very little power. Hard-drives are a bit more power hungry. |
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