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Gadget Freak Case #216: Wirelessly Charged Indestructible LED Lantern
6/11/2012

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John Duffy's indestructible LED lantern can be charged wirelessly.
John Duffy's indestructible LED lantern can be charged wirelessly.

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DRGONZO
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Iron
Good work
DRGONZO   6/11/2012 9:15:39 AM
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Well done, look forward to more projects from this young man.

tekochip
User Rank
Platinum
Very Nice
tekochip   6/11/2012 9:49:10 AM
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I really like wireless charging applications.

Nancy Golden
User Rank
Platinum
Re: Good work
Nancy Golden   6/11/2012 10:37:29 AM
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I agree, DRGONZO. It was certainly exciting to see this young man present his project and to see the next generation of engineers at work. I particular appreciated his desire to be innovative by looking for ways to improve the project.

John Duffy
User Rank
Gold
Re: Good work
John Duffy   6/11/2012 2:52:17 PM
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Thank you.  I have many more projects and I plan to submit some of them this summer.   

John Duffy
User Rank
Gold
Re: Very Nice
John Duffy   6/11/2012 2:57:43 PM
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Thanks.  The wireless charger and coils I used delivered about 12V, so you could charge almost anything.  The current, however, is pretty low, so it takes a long time to charge batteries.  If you have any improvements to the power output capability or efficency of the design, I'd love to see them. 

Cadman-LT
User Rank
Platinum
Cool gadget
Cadman-LT   6/11/2012 4:31:34 PM
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Very cool gadget! Nice to see young people interested in engineering these days!

Charles Murray
User Rank
Blogger
Re: Very Nice
Charles Murray   6/11/2012 6:29:31 PM
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Great job, John. In the next few years, the world's going to need a lot of engineers, like yourself, who are comfortable with LED technology. Very impressive!

TJ McDermott
User Rank
Blogger
Re: Very Nice
TJ McDermott   6/11/2012 10:24:07 PM
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Mr. Duffy, it is up to YOU to discover that breakthrough for fast charging.  I hope you do; you could be the person who finally gets all-electric vehicles into the mainstream.  Nothing we've seen to date has done a good job of this.

It would be nice to say "we saw him here first!"

John Duffy
User Rank
Gold
Re: Very Nice
John Duffy   6/11/2012 10:48:18 PM
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Thanks!

John Duffy
User Rank
Gold
Re: Very Nice
John Duffy   6/11/2012 10:53:01 PM
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I have gotten a slightly more powerful version (as in the video) but the main problem is that the coil's inductive resistence is high enough that no matter how much current I make avaliable, the current used is still usually below a few amps.  The secondary coil is just a few miliamps. 

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