I told Paul about my Supercharged Joule Thief but he had doubts about it having lower current consumption than a conventional Joule Thief. Originally I had set the value of the resistor to give the optimum current through the LED, and it was about 1.5k, which was good for about 20 mA LED current. But
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I bought an EcoSmart 40 watt equivalent LED light bulb from Home Depot on sale for under $12, regularly $20. It is very similar to this one (I couldn’t find it on Home Depot’s website). It was a bright white, which seems to be the only color they have on the shelves. Apparently all of
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I built this 1.5V to 9V DC-DC converter. It’s a modified Tim Williams design. It’s a Joule Thief with the output rectified and filtered, which is compared to the “Vref” zener diode and if the output voltage is too high, it turns off the base bias current to the Q2 driver transistor. The input is
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Paul emailed and said he has built his 12th Joule Thief. Man, this guy is Helen Wheels – an even dozen in a matter of a fortnight (or week or two, I forget which). I’ve been puttering with the TE Flashers. I made most of them on small pieces of “Woodsie” wood that I got
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I have heard people call the turns of a coil “wraps”, as if it’s a tamale or fast food or something. Well, it’s not, even though that may sound delicious. Each time the wire passes through the center of the toroid core, it is called a turn, even if the wire just goes through and
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