Instructables: exploring - technology - science - led - thief - popular http://www.instructables.com Fri, 29 Apr 2016 22:40:52 PDT BLOX v1.01 A high-power LED torch using a single AA-battery http://www.instructables.com/id/A-high-power-LED-torch-using-a-single-AA-battery/
A high-power LED torch using a single AA-battery - More DIY How To Projects]]> http://cdn.instructables.com/F09/6T7I/FJLOR99W/F096T7IFJLOR99W.SQUARE2.jpg http://cdn.instructables.com/F09/6T7I/FJLOR99W/F096T7IFJLOR99W.SQUARE.jpg http://cdn.instructables.com/F09/6T7I/FJLOR99W/F096T7IFJLOR99W.SMALL.jpg qs This high-efficiency design can power LEDs at 100mA of current and is not much bigger than the battery that powers it. The unique circuit uses 2 commonly available transistors (BC327 and BC337) in an oscillator to boost the 1.2 or 1.5 volts from a rechargeable (nickel) or alkaline battery to the 3+ ...
By: qs

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Thu, 7 Aug 2008 19:35:22 PDT
Make a Joule Thief http://www.instructables.com/id/Make-a-Joule-Thief/
Make a Joule Thief - More DIY How To Projects]]> http://cdn.instructables.com/FM0/49GT/FCEILXR3/FM049GTFCEILXR3.SQUARE2.jpg http://cdn.instructables.com/FM0/49GT/FCEILXR3/FM049GTFCEILXR3.SQUARE.jpg http://cdn.instructables.com/FM0/49GT/FCEILXR3/FM049GTFCEILXR3.SMALL.jpg 1up Yes, it's the infamous Joule Thief, in Instructable form! For those of you who don't know, the Joule Thief is a tiny little circuit that allows you to drive a white or blue LED from voltages as low as 0.5 volts. You think those batteries are dead? Don't throw them out yet! Hook them up to the Joule ...
By: 1up

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Thu, 14 Feb 2008 21:05:44 PST