Here is a cool site I found through one of my readers at anton.lr2.com. He built a LED flashlight out of a Mini Mag light, and a MAX756 DC-DC Step up. He made his board the size of a AA battery, so he could slide it inside of his mag light. He then uses one AA battery to power his project. This step up power supply will take the 1.5 volts from the battery and step it up to the 3.3 volts needed by the LED. It does not take a lot of current, around 90 mA, so the battery should last around 25 hours. This is a very cool project, and I am quite impressed. It is funny because I took apart my tiny LED flashlight, and saw the circuit board, wondered how to make a stepup circuit. I am glad that I found this. I really want to make one of these simple but very useful projects.
It is a relatively easy circuit to build, all you need is the MAX 756, a 0.1uf cap, 100 uf cap, 150 uf cap, 22uH inductor, and a 1N5817 Schottky diode. Anyway, this is an awesome project, good job Anton.
Go read his
article here.
11 Responses to “DIY LED Flashlight”
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Hi Os this does sound correct. Some LEDs such as red and yellow have much lower forward voltages (around 1.8 to 2.2). But ones such as white and blue have much higher voltages (around 3.2 to 3.8).
Take a look here for examples:
http://alan-parekh.vstore.ca/product_info.php/cPath/4_6/products_id/14
Cyberguys have a converter for AA mini mag-lites for $10 US for those of us who can’t solder without burning our fingers.
http://www.cyberguys.com/templates/searchdetail.asp?s=SD&T1=142+0393
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[...] Here is a cool site I found through one of my readers at anton.lr2.com. He built a LED flashlight out of a Mini Mag light, and a MAX756 DC-DC Step up.read more | digg story [...]
I Want to buy one your dc-dc step up power
if you can sale your product
thank
[...] Well, we have probably all seen the 9v altoid Ipod charger. An example is from the one that Aaron Dunlap has produced. I have to hand it to him. He has done a good job of promoting his idea. We all know though, I hope, that using a 9v battery, and a 7805 voltage regulator to produce a 5v source is a terrible way to charge an iPod. Our friend over at ladyada.net has produced a step up power supply using 2 AA batteries stuffed inside an altoid gum canister. A step-up power supply is basically a DC-DC converter. It allows you to take a small DC voltage and up it to a higher DC voltage. Ladyada does a great job of explaining all of this, and shows how she chose the parts, and designed it. You can buy the kit from her here. This is very similar to the DIY LED flashlight that I wrote about a while back. [...]
Nice site………hope you can keep it updated! Directlights.net
This flashlight seems pretty cool, but it looks kind of complicated for most people. I don’t think just anyone can put one together. I found a cool site that has a very simple led flashlight. I think just about anyone could make of these.
I’m sorry that site was makesimplecontraptions.com