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Old 04-12-2012, 02:58 AM
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jake jake is offline
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Join Date: Nov 2007
Posts: 169
Originally Posted by xee2 View Post
I have posted a number of low power Joule thief circuits. This may be a good choice ... no toroid Joule thief 3 - YouTube

Rectify radio output with diode and capacitor. Run Joule thief from capacitor. You will need at least 0.5 to 0.7 volts to run Joule thief. You do not need 10,000 uF capacitor, use what ever you have. Reduce resistor value to make LED brighter.

Same circuit with toroid >> 2 uA Joule thief - YouTube

Wish I had seen that before I untwisted 500 feet of 20 gauge bell wire. That would have been fun to try with 500'.

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