Joule Thief

[innovation_station]

IST,

You are more than welcome to come here with your coil. I would love to put it on my scope.
Maybe we could teach each other something.
Looking forward to your visit.

Tim

mr maggs i owe you a favor .... im sure you well remember ... 

thanks btw for the freq genny !!!!


william

i will visit you ...

YOU KNOW I DID .....    MR MAGS

[MrMag]

IST,

Any time any day you pick.
No problem with the genny, I hope you put it to good use.


Tim

[Pirate88179]

@ IST and MrMags:

You too get together and I am SURE we will all learn something.  That would be great.

I was shopping for scopes on e-bay but...they are a LOT of money and no telling if they are damaged, which is why they might be being sold. (I would have no idea)  At least, Jeanna's is new and since it is portable I am sure it has its limitations but, it works and to me that is the main thing.

Bill

[jadaro2600]

Ok, so I have these little brain farts every once in a while..

How is it that there is a correct voltage building up between the collector and base/ground?

I see that a source amp and voltage flows trough the coil to collector, and when it's turned on, there is a magnetic flux created, but when it goes off, shouldn't the voltage have an opposite polarity than from where it's coming from?

Which coil is creating the larger flux here? ..the coil to base or the coil to collector?

I usually don't wind a secondary, to test thing, and I notice that there's always a larger collector voltage occurring, obviously, but I'm not exactly understanding where the polarity of the charge is originating from.

---

Currently, I have a small jtc setup so that there are even turns of each, and I'm getting 60 volts, and am able to light up 9 small leds with it on 55ma ..I also noticed that the more leds I attach, the less ma it consumes...this comes at a cost to led brightness though.  I also took a measurement of the path heading to base, and it's only using 1ma and ..there is a 1v drop across the resistor, with source voltage of 1.32v.

[innovation_station]

i think im slowly pulseing the ring close to resosonance

im only HAND PULSEING IT ....   

.. LOL

rember this lil thing  lol 

http://www.youtube.com/watch?v=SBjN0wO05-w

lol

ist!