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Another way cool way to run LEDs off of way dead batteries is by using a "joule thief":<BR>
<A href="http://www.evilmadscientist.com/article.php/joulethief">http://www.evilmadscientist.com/article.php/joulethief</A><BR>
(No need to buy any chips at all! Just a transistor, a resistor, and a coil.)<BR>
<BR>
Mitch.<BR>
<BR>
<BR> <BR>
> From: jim@systemateka.com<BR>> To: noisebridge-discuss@lists.noisebridge.net<BR>> Date: Mon, 8 Nov 2010 17:27:36 -0800<BR>> Subject: [Noisebridge-discuss] LED driver<BR>> <BR>> <BR>> Great little article tells how to drive one or more LEDs <BR>> from old, dying batteries: <BR>> http://www.edn.com/article/510577-LED_flashlight_circuit_works_at_voltages_as_low_as_0_5V.php <BR>> <BR>> This is the chip that does it (LT1932): <BR>> http://www.linear.com/pc/productDetail.jsp?navId=H0,C1,C1003,C1042,C1031,C1061,P2114<BR>> <BR>> <BR>> <BR>> _______________________________________________<BR>> Noisebridge-discuss mailing list<BR>> Noisebridge-discuss@lists.noisebridge.net<BR>> https://www.noisebridge.net/mailman/listinfo/noisebridge-discuss<BR> </body>
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