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Joule Thief Circuit LED Blinks

With the "Joule Thief" circuit running, I noticed that when the battery gets low, the led will start to blink. If a meter monitors the voltage of the battery, you can see the voltage come back up a...  
 
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ewd7122 (11 months ago) Show Hide
+1
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made one myself,,playing around with battery charging,,mine blinks too,,now,,seems to be when the bat gets low it blinks.
ThaNorwegianDude (1 year ago) Show Hide
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whats a toroid core
boxa888 (1 year ago) Show Hide
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the coil looks like a sideways wound, tesla bifillar coil.
botronics (1 year ago) Show Hide
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Its 14 turns of 2 twisted ethernet wires thru a 5/8" toroid core.

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