Make: Online : DIY LED Flashlight

DIY LED Flashlight

AntonOlsen writes "This is an easy to build dc-dc switcher that can drive quite a few LEDs at 3.3V with a single AA battery. Version 1 is going in a mini mag light and I'm thinking version two will make a very light weight bike light." [via & instructions] Link to photos.

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Posted by: Fub on January 28, 2006 at 8:05 AM

It's a pity that the MAX756 is outdated - none of my regular online electronics shops carry it. The improved versions are all very, very small which makes it hard for the casual hobbyist to create this circuit.

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Posted by: cnuwer on January 29, 2006 at 9:46 PM

The 'LED Museum' has been around for a long time for those integrating LED's and flashlights. Worth a look, if you have not seen it...

http://ledmuseum.home.att.net/ledleft.htm

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Posted by: nil0lab on December 7, 2007 at 5:00 PM

Fub: they can't be that old, halted.com doesn't seem to carry them. Looks like MAX756CSA+ is current: http://www.newark.com/jsp/Semiconductors+&+Prototyping/Power+Management+ICs/MAXIM+INTEGRATED+PRODUCTS/MAX756CSA+/displayProduct.jsp?sku=23K6506&_requestid=144115

Perhaps you were hit by a temporary RoHS (lead-free) changeover issue.

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