Flash Light Based On Faraday's Induction Law. - Electronic Circuits Projects Diagrams Free

D.J. · 13th June 2005, 03:46 AM

Hi,

Has anyone seen those new flashlight that work off a little coil and magnet.

I saw it the other day, it was one of the sixty second comercial that don't tell much about the product. You don't have to use batteries, just shake the light and presto.

The coil is inside the flashlight tube, wound the lenght of the tube. Their's a little ball magnet inside. So when you shake it, the magnet moves up and down. Producing electricity.

It has not have a battery on it some place that gets charged.

Thought it was a neet idea if anyone cared.

:lol: Why didn't I think of that! :cry:

Regards

D.J.

williB · 13th June 2005, 04:07 AM

http://www.electro-tech-online.com/v...ic.php?t=15905
:wink:
i dont think it is a ball magnet that wouldnt work..
their flashlight uses only one cylindrical magnet ( mine used seven )..

D.J. · 13th June 2005, 04:29 AM

Hi williB

Sorry my mistake, they were using a cylinder magnet.

You guys go on forever in that discussion. I am trying to get through it all

So if that thing worked out ok, are you going to sell it?

Very cool idea 8)

Regards,

D.J.

williB · 13th June 2005, 04:35 AM

naaa i've got something better in mind..

D.J. · 13th June 2005, 04:54 AM

What could be better than making a ton of money off something you made.

If it works well, it would be very handy.

My Mom does the paper route and is always having trouble keeping her battery charged, and or, buying new ones. So's my Dad who also works night shifts.

Hopefully it's something I could build so they both have a good light.

Regards

D.J.

williB · 13th June 2005, 05:11 AM

as good and cool and powerfull as the shaker is , it is inherently flawed.
i dont know why i didnt see it earlier on , but this is the way to go,
http://grantsps.com/index.php?sn=novinki&kt_id=3838
strangely enough i have a larger version, of this allready made..

williB · 13th June 2005, 05:55 AM

although i see an application for the shaker, for somone that lives near water it could generate a bit of power from wave action..

**Jay.slovak** · 13th June 2005, 05:06 PM

Those "Flash lights" sounded good to me some time ago, but I heard their light is so weak, and they are so expensive, that you can buy tons of standart bateries, and it will still be cheaper than this "Magical Flash Light".

D.J. · 13th June 2005, 06:40 PM

On the commercial the flashlight was suposed to stay lit for a while with only a little shaking. :roll:

They even had a police officer on there supporting the light.

Trying to make it look better than it really is! :twisted:

But something like that should work if you used the right size of coil and a strong neodenom( rare earth magnet ) magnet.

D.J.

plot · 14th June 2005, 02:45 AM

There was another thread on this subject a loooong time ago:
http://www.electro-tech-online.com/v...37fffeff46dfe0

that one got a little in depth, and someone with one of the flashlights was able to take some good pictures of us and tell us what components it used.

i was gonna sum up what that thread said here, but you might as well just read the entire thing. 8)

D.J. · 14th June 2005, 05:21 AM

Hey thanks,

That discussion seems interesting too.

theinfamousbob · 15th June 2005, 04:44 AM

Saw a "shaker flashlight" at the Sharper Image store once...4 super bright white LEDs...shake for about a minute and you could shine in for a few minutes across the store and see the spot clearly on the other side in full daylight.

stevene · 19th June 2005, 07:00 PM

uhm.. i am electronics newbie and all, but couldnt u do something along the lines of the circuit posted below, it probably is totally incorrect, bu as a bored, drunk, newbie i thought i'd give it a try

Sorry about the wordpad .doc extension, wouldn't let me post a bitmap (got no conversion software). Sorry in advance about how wrong it is.

Roboticinfo · 19th June 2005, 09:40 PM

My sister has one of those flash lights
it's pretty cool.

13th June 2005, 03:46 AM	(permalink)
D.J. Experienced Member	Flash Light Based On Faraday's Induction Law. Hi, Has anyone seen those new flashlight that work off a little coil and magnet. I saw it the other day, it was one of the sixty second comercial that don't tell much about the product. You don't have to use batteries, just shake the light and presto. The coil is inside the flashlight tube, wound the lenght of the tube. Their's a little ball magnet inside. So when you shake it, the magnet moves up and down. Producing electricity. It has not have a battery on it some place that gets charged. Thought it was a neet idea if anyone cared. :lol: Why didn't I think of that! :cry: Regards D.J. __________________ 1.618 http://www.randomhouse.com/doubleday/davinci/ http://www.coasttocoastam.com/

13th June 2005, 04:29 AM	(permalink)
D.J. Experienced Member	Hi williB Sorry my mistake, they were using a cylinder magnet. You guys go on forever in that discussion. I am trying to get through it all So if that thing worked out ok, are you going to sell it? Very cool idea 8) Regards, D.J. __________________ 1.618 http://www.randomhouse.com/doubleday/davinci/ http://www.coasttocoastam.com/

13th June 2005, 04:54 AM	(permalink)
D.J. Experienced Member	What could be better than making a ton of money off something you made. If it works well, it would be very handy. My Mom does the paper route and is always having trouble keeping her battery charged, and or, buying new ones. So's my Dad who also works night shifts. Hopefully it's something I could build so they both have a good light. Regards D.J. __________________ 1.618 http://www.randomhouse.com/doubleday/davinci/ http://www.coasttocoastam.com/

13th June 2005, 05:06 PM	(permalink)
Jay.slovak Super Moderator	Those "Flash lights" sounded good to me some time ago, but I heard their light is so weak, and they are so expensive, that you can buy tons of standart bateries, and it will still be cheaper than this "Magical Flash Light". __________________ "I share, thus I am" Jay.slovak Read this! ICD2 Clone Best PIC/DsPIC Bootloader Read my Inchworm ICD2 review!

13th June 2005, 06:40 PM	(permalink)
D.J. Experienced Member	On the commercial the flashlight was suposed to stay lit for a while with only a little shaking. :roll: They even had a police officer on there supporting the light. Trying to make it look better than it really is! :twisted: But something like that should work if you used the right size of coil and a strong neodenom( rare earth magnet ) magnet. D.J. __________________ 1.618 http://www.randomhouse.com/doubleday/davinci/ http://www.coasttocoastam.com/

13th June 2005, 04:07 AM	(permalink)
williB Experienced Member	http://www.electro-tech-online.com/v...ic.php?t=15905 :wink: i dont think it is a ball magnet that wouldnt work.. their flashlight uses only one cylindrical magnet ( mine used seven )..

13th June 2005, 04:35 AM	(permalink)
williB Experienced Member	naaa i've got something better in mind..

13th June 2005, 05:11 AM	(permalink)
williB Experienced Member	as good and cool and powerfull as the shaker is , it is inherently flawed. i dont know why i didnt see it earlier on , but this is the way to go, http://grantsps.com/index.php?sn=novinki&kt_id=3838 strangely enough i have a larger version, of this allready made..

13th June 2005, 05:55 AM	(permalink)
williB Experienced Member	although i see an application for the shaker, for somone that lives near water it could generate a bit of power from wave action..

14th June 2005, 02:45 AM	(permalink)
plot Experienced Member	There was another thread on this subject a loooong time ago: http://www.electro-tech-online.com/v...37fffeff46dfe0 that one got a little in depth, and someone with one of the flashlights was able to take some good pictures of us and tell us what components it used. i was gonna sum up what that thread said here, but you might as well just read the entire thing. 8)

14th June 2005, 05:21 AM	(permalink)
D.J. Experienced Member	Hey thanks, That discussion seems interesting too. __________________ 1.618 http://www.randomhouse.com/doubleday/davinci/ http://www.coasttocoastam.com/

15th June 2005, 04:44 AM	(permalink)
theinfamousbob Experienced Member Blog Entries: 2	Saw a "shaker flashlight" at the Sharper Image store once...4 super bright white LEDs...shake for about a minute and you could shine in for a few minutes across the store and see the spot clearly on the other side in full daylight. __________________ -Ian

19th June 2005, 09:40 PM	(permalink)
Roboticinfo Experienced Member	reply My sister has one of those flash lights it's pretty cool. __________________ Robotics is heaven in my book.

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