Earth Battery Joule Thief LEDs Experiments
This is my new and improved earth battery running 4 ultra bright 10mm 28000 MCD LEDs. I am using a standard Joule Thief circuit wound (bifilar) on a ferrite toroid this time. An N3904 transistor, 1k resistor and a 2.3…
5 May 2009 at 07:39 · Comment
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