Posts Tagged ‘high efficiency joule thief’:

2009-01-10 Experimental Joule Thief

Date 2017-01-12 Link to Experimental Joule Thief

2012-09-20 Supercharged High Efficiency Joule Thief

The photo is of one of my Supercharged Joule Thief circuits that I built a few years ago.  This one has a supply current of 70 mA at 1.5V and a LED current of 25 mA at 3.3V (actually 25 millivolts measured across the 1 ohm [2 resistors] in series with the LED’s green wire). 

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