Joule Thief

[Sir Berman]

Hi all,

I need some real help.
I want to make a circuit to continuously light a 13W CFL brightly from a duracell 9V battery (for longer life than the 1.5V).

I have tried a few online and they didn't work - not at all or very little light.

I looked at the fuji circuit but the new cameras have a different circuit layout then the pictures posted on the web.

If anyone can help me, please give me a complete schematic with all data labeled.
Also where to get the parts.

Thank you all

[NickZ]

  Sir Berman:
   I doubt that going the 9 volt battery route will solve your duration time problem. As a 9 volt battery has much less power, 150mAh even when compared to the rechargeable 1.5 volt AA battery, which can have 2000mAh, or more. Even cheap regular 1.5 volt AAs have 600mAh, which is 4 times the current of a rechargeable 9 volt battery. Of course, the 9 volt will be a brighter light, but won't last longer.
  Wireless phone 3.6 volt batteries work ok, and take a good charge fairly quickly, but also are low current batteries. My 3.6 volt batteries wireless phone batteries are 600mah and they will light a Cfl on my Exciter all night.  D cell batteries have 10.000mAh, and can be charged, even though they are not rechargeable.
   I just charged an old dead D cell (alkaline), on a solar panel, and was able to light a 65 watt Cfl on the  Exciter circuit on just that one old D cell 1.5v battery. Of course it's not that bright, but better than using a brand  New AA battery.  I was able to charge the old dead D cell to 1.6 volts on solar, (and no leaks).  4 D cells have 40.000mAh. And you can use old dead ones and recharge them without having to buying new ones.  Just don't let them get to hot. A Slow low charge is best.  Solar garden lights work on those also. I got a garden solar light cell that outputs 4 volts. 40mA.
  I can light my gutted or ungutter Cfls (even 65watt Lights of America Cfls) with the same or similar circuit as is now being shown on the last video posted on the home page of this OverUnity.com site, by Lynx Steam (Exciter circuit).  You can make a much smaller exciter coil as I've done, using a one inch coil, with a ferrite rod inside. But, it won't be all that bright, maybe 1/4 brightness of the same Cfl bulb on 110v.  Makes for a nice night light though, and maybe a little brighter than just a night light.
  I'm also intersted in being albe to light Cfls to FULL brightness, as I have many of them, but it's not that easy to do.
  Any ideas are welcome.
                                          NickZ

[gadgetmall]

Welcome Sir Berman !
        I suggest to you the Joule Thief 101 thread located here http://www.overunity.com/8341/joule-thief-101/#.UEqG11JQDU0 . There you can find information on HOW TO'S
And also http://www.overunity.com/10723/fuji-joule-thief-full-instructions-video-and-pics/#.UEqGoVJQDU0 Which is where you can get help on camera flash units .

I prefer single cell projects so can't help you with 9 volt battery things. . It is UN-economical in my opinion . And
Nickz is also given very good information.

Your Goal is one that is obtainable but the power loss converting a 9 volt battery to meet the low volt requirements of camera flash units will drain it faster than just using 1.5 volts to start with .  This is an example of what a little aa battery can do . (borrowed from jt101)
you need patience and some time .I listen to some winding music it helps me wind copper line . http://www.youtube.com/watch?v=-JunmomMSK0&feature=related
Gadget

[kooler]

so guys,
we going to build something and try to make self run.. what circuit should we try first.. theres only a hunderd slightly different ones in the jt thread
oh..  gadget i would say me seeing you talk of cooking thing years ago.. probably keyed me to try since i had it in my head already.. just don't cook in the microwave..
i have learned alot from you folks over the years..
what i always liked about the jt thread was there was no theoretical physicist going on in here..
just hard work..

robbie

[Pirate88179]

Robbie:

Well, I had been thinking, (possibly incorrectly) that when attempting a self run device, we need diodes to keep the juice flowing in the desired direction.  In other words....in a simple JT, instead of an led, I feed that back to the battery, how does the battery know which way I want the electricity to go?  I am thinking it doesn't.  Possible diodes on the positive and neg. lines going back to the battery might help with this?  Just tossing it out there.

Bill