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Overunity Machines Forum



Is that a joule thief?

Started by Jeg, April 15, 2013, 02:27:38 AM

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e2matrix

#15
April 23, 2013, 01:01:31 PM
Quote from: Groundloop on April 20, 2013, 10:58:12 AM
e2matrix,

I finally got time to download and study the data sheet for your 2SC5778 and you can NOT use that
transistor in the Figure-8 circuit. The reason is that the 2N5778 has an internal diode over the collector
emitter wires. The transistor also have a internal resistor between base and emitter. You need to find
a high voltage power NPN transistor that does not have any internal "extra" components.

GL.


Thanks Groundloop.   I do see that extra stuff now in my datasheet.  This transistor is working now in a battery charger circuit posted by member rfnreynders on Laserhacker.com and on energeticforum.com and seems to be one of the few I've tried works good in that circuit for that 'big spike' desired for desulfating.    I've got a 2SC2555 that looks like it might work for the figure 8 circuit but my datasheet doesn't show any internal configuration -- so I'm assuming it doesn't have any extra 'stuff'.   

Groundloop

#16
April 23, 2013, 03:14:38 PM
Quote from: e2matrix on April 23, 2013, 01:01:31 PM

Thanks Groundloop.   I do see that extra stuff now in my datasheet.  This transistor is working now in a battery charger circuit posted by member rfnreynders on Laserhacker.com and on energeticforum.com and seems to be one of the few I've tried works good in that circuit for that 'big spike' desired for desulfating.    I've got a 2SC2555 that looks like it might work for the figure 8 circuit but my datasheet doesn't show any internal configuration -- so I'm assuming it doesn't have any extra 'stuff'.

e2matrix,

I did download the data sheet for the 2SC2555 and the transistor is OK to use in the Figure-8 circuit.

( My JT battery voltage is now [23.04.2013 2100] down to 2,81 Volt. That is a drop of 0,02 Volt in 6 hours. )

GL.

Groundloop

#17
April 24, 2013, 12:48:57 AM
My JT battery voltage is now [24.04.2013 0645] down to 2,79 Volt. That is a drop of 0,02 Volt in approx. 10 hours.
LED still bright enough to be used as a night light. Oscillator frequency at 465KHz.

GL.

Groundloop

#18
April 24, 2013, 10:45:05 AM
My JT battery voltage is now [24.04.2013 1645] down to 2,77 Volt. That is a drop
of 0,02 Volt in 10 hours. LED still bright enough to be used as a night light.

GL.

e2matrix

#19
April 24, 2013, 11:47:09 AM
Thanks again Groundloop.   Sounds like you've got a finely tuned JT there.   Thumbsup smiley here  (hint hint Stephan)
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