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 Post subject: Re: BEMF triggered self oscillating transistor
PostPosted: Mon May 03, 2010 3:04 am 
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The battery I use in the last video is originally dead battery. I tried charging with direct DC for 5 hour and it don't hold carge the next day, <1 V with motorcycle light bulb as load. With the circuit running at 160mA (first version) and charging for 6 hour the battery can hold at 7V with light bulb as load. The next 6 hour with 380mA (second version) can make it hold at 9.5V with lightbulb as load.

The charge is definitely real charge, since after the first chargin I let it power the ligth bulb for 3 hours which make the battery much warmer then charging.

The behaviour of my charger is typical Bedini one, more amp with less resistance, more amp when the battery is almost full.

I use various coil and transformer. And yes if I replace the coil with small dc motor, the dc motor will run.

I think with better conventional COP, the radiant part would be boosted tremendously too. This circuit is 8 times more efficient than my first 2Amp oscillator.


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 Post subject: Re: BEMF triggered self oscillating transistor
PostPosted: Mon May 03, 2010 9:15 am 
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Just found out that my circuit can be made simple:
Image

Just add another transformer with two diode to add efficiency.


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 Post subject: Re: BEMF triggered self oscillating transistor
PostPosted: Fri May 14, 2010 3:06 am 
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Testing combined circuit with booster circuit

Input power:
without booster = [email protected] = 10.925 watt
with booster = [email protected] = 14.49 watt

Output power
without booster = [email protected] = 3.348 watt
with booster = [email protected] = 6.912 watt

Efficiency:
without booster = [email protected] = 30%
with booster = [email protected] = 47%

http://www.youtube.com/watch?v=TGftL-Zb4oM


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 Post subject: Re: BEMF triggered self oscillating transistor
PostPosted: Fri May 14, 2010 7:56 am 
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62% efficiency when lighting a light bulb

http://www.youtube.com/watch?v=GSFmOgn-VVY


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 Post subject: Re: BEMF triggered self oscillating transistor
PostPosted: Mon May 17, 2010 9:24 am 
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Corrected circuit:
Image


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 Post subject: Re: BEMF triggered self oscillating transistor
PostPosted: Tue May 18, 2010 4:57 am 
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Your link is missing


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 Post subject: Re: BEMF triggered self oscillating transistor
PostPosted: Tue May 18, 2010 9:06 am 
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Sorry, thanks. Here it is.
Image

I actually use inverted leg all of this time and don't realize it. The change of leg made the falstad simulation unable to simulate it anymore. It works better than the "proper" leg in real life.


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 Post subject: Re: BEMF triggered self oscillating transistor
PostPosted: Thu May 20, 2010 6:09 am 
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showing sting oscillator source & charged being swapped alternately on each 30 seconds.

Show good efficiency

http://www.youtube.com/watch?v=mKDndLGK0Hk


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 Post subject: Re: BEMF triggered self oscillating transistor
PostPosted: Fri May 21, 2010 3:51 am 
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YouTube - 3V battery charging 12V battery


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 Post subject: Re: BEMF triggered self oscillating transistor
PostPosted: Fri May 21, 2010 9:25 am 
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YouTube - 1000V sting oscillator - one diode version


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