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Beth Stackpole
User Rank
Blogger
Re: done
Beth Stackpole   10/22/2012 7:01:45 AM
NO RATINGS
John: Nearly as impressive as your design is your knowledge of the different specifications and attention to using that data as part of a process around design tradeoffs. Looking under the covers and considering the pros and cons of different materials and different design choices is all part of the game and you are well on your way to becoming quite a diligent and thoughtful engineer.

John Duffy
User Rank
Gold
Re: done
John Duffy   10/21/2012 12:30:40 AM
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Not sure whether you meant that those are better, or this is, but I did notice that they were over $600 and $1000usd respectively.  This was about $50, and runs cold.  Those, just judging by size, would run VERY hot, and would probably not run for the claimed ~2 hours without overheating.  Either way, I wasn't claiming that this is the brightest possible light, just that it is very bright.   

greg
User Rank
Iron
done
greg   10/20/2012 12:53:26 AM
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http://www.niterider.com/pro-3600-led-2013/

http://www.lupine2013.de/produkte/bike_and_helmetlights/betty_r_12/

John Duffy
User Rank
Gold
Re: Go John!
John Duffy   10/19/2012 8:00:53 PM
NO RATINGS
Thanks everone, I really appreciate it. 

 

I also would like to note that yesterday the LEDs I used were re-specced by the distributor (DX.com) , thus the light isn't quite 3000lm.  Not by much, of course, but about 2700lm-2800lm.    

gsmith120
User Rank
Platinum
Re: Go John!
gsmith120   10/19/2012 6:26:02 PM
NO RATINGS
John very nice!! Young people should read/see/hear more stories like this one.

mrdon
User Rank
Platinum
Re: Go John!
mrdon   10/19/2012 9:36:34 AM
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Beth, I agree, what a cool Gadget Freak video! John is definitely passionate about LEDs and I can see him becoming the next Thomas Edison of the 21st century. I have a couple students in my Electrical Engineering Technology program (I'm Dept. Chair) at ITT Tech want to share this video with to get them motivated about their field of study. Very Nice work John!!!

Beth Stackpole
User Rank
Blogger
Go John!
Beth Stackpole   10/19/2012 7:22:57 AM
NO RATINGS
Cool invention, John, and one that I'm sure you'll get lots of fun use out of (watch your eyes everyone). But what I love most about this Gadget Freak example is that John is 15 and motivated enough to pursue his interest in engineering and science to experiment with new technologies like LED. Keep it up and let's hope there are lots more Johns out there today honing their engineering skills for tomorrow.

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