Joule Thief

[NickZ]

  Another possible self-running circuit. Although it is not a JT, as there is no transistor, it will self-run, once kick-started,  if what we see it true.
  Simple enough for anyone to replicate it. It could help to prove the point of obtaining energy from the surrounding medium. The trick is how to upscale it.
  http://www.youtube.com/watch?v=ljKX9Om7Z4s

[NickZ]

   Guys:
  Another possible self-running circuit. Although it is not a JT, as there is no transistor, it will self-run, once kick-started,  IF what we see it true.
  Simple enough for anyone to replicate it. It could help to prove the point of obtaining energy from the surrounding medium.
  The trick is how to upscale it...

  http://www.youtube.com/watch?v=cTowOHDeB5Y
 

[MileHigh]

NickZ:

Both clips are fakes.  In the first clip they even state it in the annotations at the end of the clip and will be revealing how they did it in the future.  The second clip is from this guy that is a kind of "free energy performance artist" and all of his clips are fake.  Sometimes they are very tongue in cheek, sort of like he is sarcastically poking fun at himself and what he is doing.  He wants you to laugh along with him.  I think that he just invented his strange sounding English accent as part of his "character."

There are a thousand stories in the naked city.

MileHigh

[NickZ]

  Yes, I know that the first video clip was supposed to be faked, although they don't show the trick, even later,  but the second one was not.
   But, how do we know that the second one is also a fake? 
He needs to take it away from everything electrical in the house, like out into the yard, even maybe at night also, and show it working, then.  He should have done something like that, if it did work as shown, but away from everything.
  If it's also a fake, WTF do people do that? 
  No,  you don't need to answer that. 

[MileHigh]

From Wikipedia:

Power sources

Main article: LED power sources

The current–voltage characteristic of an LED is similar to other diodes, in that the current is dependent exponentially on the voltage (see Shockley diode equation). This means that a small change in voltage can cause a large change in current. If the maximum voltage rating is exceeded by a small amount, the current rating may be exceeded by a large amount, potentially damaging or destroying the LED. The typical solution is to use constant-current power supplies, or driving the LED at a voltage much below the maximum rating. Since most common power sources (batteries, mains) are constant-voltage sources, most LED fixtures must include a power converter, at least a current-limiting resistor. However, the high resistance of 3 V coin cells combined with the high differential resistance of nitride-based LEDs makes it possible to power such an LED from such a coin cell without an external resistor.[