Joule Thief

[Pirate88179]

Nick:

I think that Crowclaw could answer this better than I could.  The solar cell would be more constant than a battery....as long as the sun was shining. There might be a way to electronically adapt this to battery drain but, I do not know what that might be.

This is why we need good folks that think of good ideas and experiment with them.  You never know.

Bill

[Mk1]

  Bill:  Thanks for your reply. That is what I thought, concerning the Leds compared to CFLs.  But I thought that I'd ask in case someone had been able to light even regular 12 volt car bulbs with the Jt.  I've seen the Tros youtube videos where he is lighting three small flashlight type bulbs. He does not use toroids coils. I though some one else may have been able to light a regular bulb.  You never know...
   Bill: Do you think that a possible solution to the Jt circuit losing resonance can be overcome by maintaining a fixed input voltage.  Possibly the easiest way to do this is, using a solar panel that charges and maintains a big run battery that serves as a steady input source for the Jt.  What do you think?
                             Nick

I did light some bulb s from the secondary on my JT , it is not the most efficient way to get light as Pirate mentioned  but it is a great way to test your circuit with inductive loads something cfl and led can't do , i think the circuit can do more then light leds .

I use the same bulb as mopozco on his tros circuit , bu i do it from the secondary ...

http://www.youtube.com/user/abramrk1#p/u/9/wS935WyumjY

http://www.youtube.com/user/abramrk1#p/u/7/iz4pN-LybGo

http://www.youtube.com/user/abramrk1#p/u/6/eiLcbTBewhw

http://www.youtube.com/user/abramrk1#p/u/5/myZrCurW0uE

Mark

[crowclaw]

High NickZ
Your idea regarding transformer action using the high voltage primary JT side
with a separate wound secondary has of course been replicated hear many times over. Jeanna has several design using the secondary wind to drive a load. MK1 has just posted an example of using the secondary to light a torch bulb. Note also some brilliant variations he has put together building very efficient JT coils. Just goes to show how far some experimenters have gone in past threads. I would agree the JT still has plenty of ideas yet to be discovered, however the more circuitry you introduce around it the more complicated it becomes, and defeats the object past experimentation. The JT circuit is very similar to boost converters which can produce useful high voltage outputs from low voltage inputs. The difference hear is the drive oscillators are very stable waveforms and easier to design with predictable circuit values and parameters. So far most of the JT circuits have been applied to led lighting, from which the basic circuit  principle is ideally suited... simple and cheap to replicate. The current draw and source voltages are extremely low. Jeanna and Bill  have made good use of the JT circuits for led lighting applications. Not to mention the their experimental work in powering them up using alternative power sources. Earth batteries, solar power etc. There must be hundreds or thousands of disused garden solar lights being disposed of, as their internal batteries or circuits fail! If theses were retrieved, the solar panels could be put to very useful use. Build them up into a larger panel... charge up some cells. You can easily put a control regulator circuit together for your low JT source voltages. Anyway just a few ideas. Someone could publish a book out of this thread!! it's all exciting work. Regards Merv

[nievesoliveras]

@mk1

You did a great job with those coils!

Jesus

[NickZ]

   @ Mark:
    Thanks for your reply.
    If that can be done than with 2 volt bulbs running off of one AA, then with a 10 times stronger 12 volt system, maintained and kept up by a solar panel , that is connected to one or more Jt circuits,  we should have no problem lighting 12 volt car bulbs, of like 5- 10 watts or higher current.
   I know that its not as efficient as using Leds, but I do like the golden light alot better, and expecially if the battery recharging is free.  Looks like the best light came off of the C and E off the transistor, (but it's hard to tell).
   Thanks again for your comments and videos, I do appreciate them. 
                       NZ