A joule thief is a minimalist Armstrong self-oscillating voltage booster that is small, low-cost, and easy to build, typically used for driving light loads. It can use nearly all of the energy in a single-cell electric battery, even far below the voltage where other circuits consider the battery fully discharged; hence the name, which suggests the notion that the circuit is stealing energy or "joules" from the source. The term is a pun on the expression "jewel thief": one who steals jewelry or gemstones.

Super Efficient Joule Thief DIY. Testing using Oscilloscope known as a "scope", to see the form of the wave or "waveform" can be analyzed for such properties 1. Amplitude 2. Frequency 3. Time. Save your time to get more effect. See previous video https://www.youtube.com/watch?v=7Mb1p5JE-mI Τo steal all the last energy from a battery and without any Toroid coil. Stay Tuned and Enjoy! If you like my demonstration Please click the "like" button, subscribe my channel, and share this with your friends... To support my "work" every little bit helps! THANKS....

Many Thanks "http://goo.gl/iVQVeM" for Scopemeter and electronic parts Now you can see the RESULTS...
UNI-T Digital Multimeter UT81B Scopemeter. Here it is!! http://bit.ly/1QuAHlg
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A joule thief is a minimalist Armstrong self-oscillating voltage booster that is small, low-cost, and easy to build, typically used for driving light loads.It can use nearly all of the energy in a single-cell electric battery, even far below the voltage where other circuits consider the battery fully discharged; hence the name, which suggests the notion that the circuit is stealing energy or "joules" from the source. The term is a pun on the expression "jewel thief": one who steals jewelry or gemstones.

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