Joule Thief

[xee2]

@ jeanna

The proof is that it went on) and there was absolutely nothing at the secondary.

I have no explanation for that. Seems very strange that when a voltage is being generated across the collector coil that there would be absolutely nothing at the pickup coil. You do come up with difficult problems. But those are the best to learn from.

[xee2]

Wow. This circuit is lightling the fluorescent tube brightly with only 51 ma.

[TheNOP]

eddie currents is the current generated my a magnet crossing copper and inducing a electric field that is not properly grounded or allowed to excape. eddies are thereby rellative to the resistance of electrical flow.  if electricity had NO resistance there would be no eddies, if there is NO electrical flow there is max eddies. by placing a cap in direct contact of the generator output and having that cap be of a large enough capacity to properly obsorb and smooth out all the currents supplied by the generator you are essentially eliminating a large resistance because now the curcuit board IE charger component is not in the way slowing the flow.

i won't argue with you.
i already told you what eddy currents is and won't repete myself.

with the copper tube experiment take a neo magnet (preferably the stronger the better) and drop it down a copper plumbing pipe. it will fall really slow. now attatch a electrode from one end of that pipe to a lightbulb (florecent was demonstrated) and connect the other end of the pipe to the other end of the bulb or other load. now you will see the magnet fall at a normal rate because it is able to better dispose of the electrostatic field built up in the conductor.

i just did that experiment.
i must not have the right electrodes because it does nothing.
the drop speed of the magnet is not affected.
i connected the resistances to both side of the pipe with alligator clips in different ways.
the only way a have not try is with one connection to the inside of one end to the outside of the other end.
resistances i used were 10, 330 and 2k Ohms

i have even tried to take volts and amps reading and was not getting anything.

but i was kinda expecting those 0 values because droping a magnet in a pipe is the same as an homopolar generator.

Edit.
tables code are screwed in this forum...
see the table here homopolar generator
position 5 in the table.
rotating = movement
disk = the tube
external indicating circuit = pickup brushes

if the tube was a coil of the same length of my tube. the magnet would drop fast when the coil is not connected to anything and drop slower if the coil is shorted or connected to a low value resistor.
what is making the magnet drop slower in that case can not be called eddy current.
a mag field crossing a wire at 90 degres does not create eddy currents.


the magnet drop speed would be different if i was to connect a capacitor to the coil.
can you tell me why ?

you don't really have to answere that question.
i already know the reasons why.

[Cap-Z-ro]

Bill, its your collective openness and receptiveness to each others ideas is what makes this group so productive.

You people all belong in a lab somewhere...but not as subjects tho.

Regards...

[stprue]

Yes.

I missed saying this quite the right way.

If you did it, and it looked interesting to someone else, that person would try it and then next one then again. OR if you tried it and someone helped you get it right, then someone else might want to try it too.

It is a more organic approach than a suggestion, because I am positive that the good folks on this thread have many ideas yet untried and will simply not get around to it... before you that is.

======

@2N3055
It simply does not work with one battery in this application.
Period.
I even used a lithium AAA which has 1.72v right now.

I have 2 of these 2N3055. One says HV after the 3055 part so I used both of them.

The thing is set up fine but the BJTLed does not go on unless I use 2AAA and my 2AAA at the moment has 2.64v.
I used 2 resistors 150r and 500r.

And even then when the BJTL goes on with the 2AAA batteries, there is no activity in the secondary. NONE!!!

And, this is NOT the new toroid. This is with the tried and true MK1 that I have made so many tables about 3T,4T,92T. This MK1 works and works well, too.

Humbug.

jeanna

I'm very surprised that the 2N3055 wont work for you! My first real set up uses this and it works great  40-9-7 and 4.7k POT old panisonic AA battery. Oh well I like the tip31c better anyway it seems to have better gain to me.