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OverUnity Research > Electrical / Electronic Theory and Learning Center > Joule Thief Circuits > Micro Shark
2024-04-25, 19:11:54
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Author Topic: Micro Shark  (Read 16254 times)
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img  4Tesla
Micro Shark « on: 2014-03-30, 19:39:25 »
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This is Igor's TROS (transistor oscillator) circuit based on Akula's 80w.  I call it the Micro Shark.  :)  He says it is a self-running JT.  It is supposedly a long runner.. a few days?

TROS - "long-runner" 2
https://www.youtube.com/watch?v=YPiUSCQIKC4
   
img  Peterae
Re: Micro Shark « Reply #1 on: 2014-03-30, 21:26:04 »

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2 things, i was not happy with the way he connects the battery for a long time, the only reason i can think to do this is to shorten the time period the device is un-powered by the battery.

The other thing was that he then placed the battery in series with the LED, this may well be to charge it, but if momentarily the battery and series led's have varying impedance of the inductor then the battery may end up introducing power to the system.
   
img  4Tesla
Re: Micro Shark « Reply #2 on: 2014-04-05, 07:06:02 »
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Quote from: Peterae on 2014-03-30, 21:26:04
2 things, i was not happy with the way he connects the battery for a long time, the only reason i can think to do this is to shorten the time period the device is un-powered by the battery.

The other thing was that he then placed the battery in series with the LED, this may well be to charge it, but if momentarily the battery and series led's have varying impedance of the inductor then the battery may end up introducing power to the system.

I asked for the values of the components and he replied.. "don't waste your time.. runs off capacitor".. which I already knew, but still would like to build.
   
img  Peterae
Re: Micro Shark « Reply #3 on: 2014-04-05, 08:35:28 »

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Thanks 4Tesla for telling us his reply, at least he's honest  ;D
   
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