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Overunity Machines Forum



Single AA battery to light WHITE LED for long-long time

Started by zon, March 05, 2008, 05:18:40 AM

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bolt

#135
March 28, 2008, 12:24:17 AM
Looks a total waste of time to me. The circuit is just a simple oscillator with the L being the core and C is the stray capacitance of the circuit which means it will oscillate at many megs. The  transformer coupling has been done in RF stages for 100 years nothing fancy going on here at all. What you will get is "mystery" readings as you start to increase power RF will get back into you DVM and convince you have have found extra power. If you do this with a power fet some will easily put out 5 watts of RF run on 12 volts and they will splutter up and down the band and make a lovely jammer for miles around!

If you start making spark gaps you will create havoc with TV's and radio and you wont be popular with your neighbors.

If you want to light up the LED with no battery make a simple tuned circuit. Ground one end and stick an aerial wire on about 150ft long thin copper wire then tune the output into an LED. It will light up from strong AM radio stations for FREE :) 

But this is all kids stuff i did all this when i was about 7.

BTW the battery starting low and increasing is well documented due to partial oxidation of the cell plates on standing. As you start to draw current this oxi layer burns off increasing plate area and the voltage comes up a tad then drops later as the battery is used. Lithium batteries suffer badly from this effect.

Groundloop

#136
March 28, 2008, 07:33:58 AM
@Bolt,

I started to play with electronic at the age of 9. Now, at 50 I'm still learning new things.  ;D
Many of the members on this forum plays with these circuits as a hobby. I think most of
them also think this is fun. Personally, I think that ANY hobby is NOT a waste of time.

QuoteBTW the battery starting low and increasing is well documented due to partial oxidation of the cell plates on standing. As you start to draw current this oxi layer burns off increasing plate area and the voltage comes up a tad then drops later as the battery is used. Lithium batteries suffer badly from this effect.

Can you provide a reference to your statement?

Groundloop.

Drossen

#137
March 28, 2008, 09:43:53 AM
Do you want to know what happens when you boil the acid in a battery?  Well, I just happen to have first hand experience with this.  When I was a teenager, I was playing with batteries, and just happened to make the mistake of heating one up to the point where it started to boil inside.  After several minutes of hearing the acid boil, I noticed that the battery was bulging, and after a few more minutes it exploded.  Hot acid and pieces of battery flew everywhere.  The acid ate wholes in my clothes, and I received second degree burns from the heat of the acid, not to mention the additional burn caused by the acid eating at my skin.  It was not cool!!  If you want to try boiling the acid in a battery, I would highly advise against it.

Drossen
Failure is not an option (it comes bundled with Windows)

MrMag

#138
March 28, 2008, 11:12:15 AM
Sorry guys, I may be out of line but I just came across this thread and really haven't read it through so shouldn't really comment but.....

Are any of you out there Pink Floyd fans? I purchased their Pulse CD many years ago. What they had on the CD case was a red LED that pulsed. I am pretty sure I had to pull out the little plastic tab to get it started. This LED pulsed on at a slow rate ( ~.5 sec on - ~2 sec off) but it pulsed for over 4 years without changing the battery. I couldn't believe that it would have lasted that long!

Tim

Feynman

#139
March 28, 2008, 11:24:00 AM
Pink Floyd fan here...

The duration of the LED doesn't surprise me too much... depending on the type of battery a little LED can go a long time.   What's interesting about the joule thief circuit, however, is the high voltage transient occurring in a coil which is wound 1:1.  There may be a good conventional explanation, but I think the waveform and circuit operation are very interesting. Especially the 20V I was measuring on one of the coils, coming from a sub-1V battery.  This may all be conventional , but I didn't know this was possible until I built it.  I still haven't gotten around to doing the full scope traces around the circuit or creating the spark gap because of all the other stuff, but I hope to have some time soon.

@Bolt
You mean to tell me a tiny sub-mm spark gap is going to wreak havoc on my neighbors reception?  I've gotta build this!    :D




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