Self Running Micro TPU, with closed loop.

[newton2]

sorrydeletedcausednomorepurposewkr

[Omega_0]

Is anyone building it on a bigger scale ??

[Localjoe]

@all

Ive been playing with a joule thief circuit and had a weird encounter , i figured you guys might help me answer it.  After building it with a small toroid and a 2n3904 transistor i was hooking things up on my bread board and letting it run 2 led's   i accidentally got my toroid too close to a neo magnet  and the magnet flung to it... now the cool part is here when i position the magnet at the top of the toroid or a steel mouse ball with magnet on the other side to the top of the toroid my visible light increases.. 

Why would sticking a magnet or a steel ball with a magnet on the toroid of a joule thief  make my led's brighter.

Now there was a sweet spot for this no real science i just moved the thing till it got brightest then continued to let it go for 10 mins and put the magnet back on to check again .. every time the magnet makes it brighter( not more than the prior attempt but still greater than normal) these two led's have been running all night on a dead aa that started at .6v and is at .5 v now .. the led's aren't real bright anymore but i still can do the magnet test and see an increase in luminosity. As well the amperage draw is somewheres between 20 and 30 ma and doesn't change noticeably with the magnet or not. Any idea to why that would happen folks or if it could be used to help something... I envision that the somehow the toroid is now interacting with the magnet during its kick back and possibly breaking the feild lines on its own from the toroids back and forth movement.. just a thought but i would like to know if anyone here had any thoughts. Thanks again folks
                                                               Joe

[wattsup]

@Localjoe

Good find. I would say the cause of this is the fact that you are running at such a low voltage, and the leds are so dim, that the effect from the magnet "is" noticable. If you were running this at let's say 4-6 volts, the LED would be brighter to start with and the magnet, although it would provide the same effect, would not be noticed.

This is what I meant by having such a great circuit like this that is sensitive enough to show differences in the slightest variances that would be very hard or impossible to see at the higher voltages.

I got my second breadboard cause I don't want to touch my current build that has been running since Dec 22. This is not even with a toroid but a small isolated transformer I found.

[hoptoad]

@all

.......  i accidentally got my toroid too close to a neo magnet  and the magnet flung to it... now the cool part is here when i position the magnet at the top of the toroid or a steel mouse ball with magnet on the other side to the top of the toroid my visible light increases.. 

Why would sticking a magnet or a steel ball with a magnet on the toroid of a joule thief  make my led's brighter.

@Localjoe

The magnet will increase the "Q" factor and induction of the toroid which increases the inductive reactance of the drive/output coils, which in turn increases the Collapsing EMF voltage output of the drive coil and consequent induced voltage of the output coil. With increased inductive reactance, there should also be a very minute decrease in current consumption. You may not notice this however as you are driving the coil with very low voltage and current as it is. But a sensitive and accurate meter set in the micro-amp scale will probably show this slight reduction in consumption.

Cheers from the Toad who Hops