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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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L.E.D Flashlight
I have seen an advert for an L.E.D flashlight that is activated by shaking
it,there are no batteries. How does it work ? |
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geoff smith wrote:
I have seen an advert for an L.E.D flashlight that is activated by shaking it,there are no batteries. How does it work ? Probably about as well as one can shake it. Maybe Fox could use it on their new dance contest show. -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . |
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In message , geoff
smith writes I have seen an advert for an L.E.D flashlight that is activated by shaking it,there are no batteries. How does it work ? from http://www.generationgear.com/produc...echnology.html " It all started back in 1830 when the English physicist Michael Faraday discovered that passing a magnet near a wire coil could induce an electric current in the wire. This "Faraday Principle" forms the foundation for all of today's electric motors, generators, & transformers. Generation Gear has taken this principle to the next level. We have combined it with two advanced semiconductor devices to create a flashlight that never needs batteries! Shaking the ShakeLight will cause a magnet to slide back and forth inside the flashlight handle. As it does so, it passes through a copper coil, thereby inducing a current in the coil's wire. This current is then stored inside an electronic component called a capacitor which in turn provides power to the LED (Light Emitting Diode). " -- dave @ stejonda Beyond the farmyard the wind in the trees. |
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"dave @ stejonda" wrote in
: In message , geoff smith writes I have seen an advert for an L.E.D flashlight that is activated by shaking it,there are no batteries. How does it work ? from http://www.generationgear.com/produc...echnology.html " It all started back in 1830 when the English physicist Michael Faraday discovered that passing a magnet near a wire coil could induce an electric current in the wire. This "Faraday Principle" forms the foundation for all of today's electric motors, generators, & transformers. Generation Gear has taken this principle to the next level. We have combined it with two advanced semiconductor devices to create a flashlight that never needs batteries! Shaking the ShakeLight will cause a magnet to slide back and forth inside the flashlight handle. As it does so, it passes through a copper coil, thereby inducing a current in the coil's wire. This current is then stored inside an electronic component called a capacitor which in turn provides power to the LED (Light Emitting Diode). " A local TV news consumer segment did a test on these LED lights and found them to not be very useful,nor worth the money.They dim very quickly. -- Jim Yanik jyanik at kua.net |
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Jim Yanik wrote:
"dave @ stejonda" wrote in : In message , geoff smith writes I have seen an advert for an L.E.D flashlight that is activated by shaking it,there are no batteries. How does it work ? from http://www.generationgear.com/produc...echnology.html A local TV news consumer segment did a test on these LED lights and found them to not be very useful,nor worth the money.They dim very quickly. All they need is an appropriate celebrity to endorse and demonstrate it. Somebody like Michael J. Fox or Muhammad Ali. ;-) |
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A local TV news consumer segment did a test on these LED lights and found them to not be very useful,nor worth the money.They dim very quickly. I played with one in a store once that worked ok, but it did take a lot of shaking to charge it up. Would be good as an emergency backup as the batteries can never go dead. |
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"geoff smith" wrote in message .uk... I have seen an advert for an L.E.D flashlight that is activated by shaking it,there are no batteries. How does it work ? It's like a reverse vibrator. N |
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NSM wrote:
"geoff smith" wrote in message .uk... I have seen an advert for an L.E.D flashlight that is activated by shaking it,there are no batteries. How does it work ? It's like a reverse vibrator. N I think it would have to be a solar powered vibrator to make the analogy work. -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . |
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CJT ) writes: NSM wrote: "geoff smith" wrote in message .uk... I have seen an advert for an L.E.D flashlight that is activated by shaking it,there are no batteries. How does it work ? It's like a reverse vibrator. N I think it would have to be a solar powered vibrator to make the analogy work. Actually, the vibrators I've taken apart have a cheap DC motor in them, and then a weight on the shaft that is asymmetrical. So when the motor turns, there is an imbalance, hence the vibrations. The concept of a reverse vibrator is that if you shake it, you get power, while a vibrator shakes when you apply power. But since there is a motor in there, it's not a great analogy. Everyone knows that an electrical motor can generate power if you turn the shaft. You aren't likely to be able to rotate the shaft of the vibrator motor by shaking it, so it's not a reversible concept. Let's not forget those cheap DC motors have magnets in them, and a winding. Not really different from the concept of those flashlights. The difference being the mechanical arrangement. Instead of turning the shaft to get voltage, there is a more free-form generator that works when you shake it. Indeed, I have a windup LED flashlight, and I assume the only real difference is that I crank it to charge it, rather than shake it. Michael |
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On 14 Jul 2005 02:20:53 GMT, Michael Black wrote:
Actually, the vibrators I've taken apart ..... STOP right there! Thank you. :-) |
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"NSM" wrote in message
news:FNfBe.122053$9A2.66810@edtnps89... "geoff smith" wrote in message .uk... I have seen an advert for an L.E.D flashlight that is activated by shaking it,there are no batteries. How does it work ? It's like a reverse vibrator. And it's very difficult to activate without making an obscene gesture. -- Reply in group, but if emailing add 2 more zeros and remove the obvious. |
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On Thu, 14 Jul 2005 02:26:52 -0400, "Tom Del Rosso"
wrote: "NSM" wrote in message news:FNfBe.122053$9A2.66810@edtnps89... "geoff smith" wrote in message .uk... I have seen an advert for an L.E.D flashlight that is activated by shaking it,there are no batteries. How does it work ? It's like a reverse vibrator. And it's very difficult to activate without making an obscene gesture. I hear you can go blind if you use it too much also. |
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"none" wrote in message
... I hear you can go blind if you use it too much also. Yeah, the UV output is pretty high. -- Reply in group, but if emailing add 2 more zeros and remove the obvious. |
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"NSM" bravely wrote to "All" (13 Jul 05 21:34:29)
--- on the heady topic of " L.E.D Flashlight" NS From: "NSM" NS Xref: aeinews sci.electronics.repair:53131 NS "geoff smith" wrote in message NS .uk... I have seen an advert for an L.E.D flashlight that is activated by shaking it,there are no batteries. How does it work ? NS It's like a reverse vibrator. Don't excite the ladies needlessly by using those words, please... A*s*i*m*o*v .... From small chips to big breasts, silicone is great! |
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Big magnetic going past a coil, generator power to charge a capacitor, that
runs the LED keep away from your credit cards, phone cards or any other card that has a magnetic strip on it. geoff smith wrote in message .uk... I have seen an advert for an L.E.D flashlight that is activated by shaking it,there are no batteries. How does it work ? |
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