Joule Thief

[Pirate88179]

@electricme,
I really don't know how long the battery will last as I have a switch on the light and intended to only turn it on when needed.  However, I do have plenty of batteries at hand, so I will go ahead right now and turn on the light, and see how long it will stay lit.
4:42 pm March 31 light is now on
@all
I have to get some of those UK battery magnets!  I tried to solder some today, and YUP, Bill was right...heat destroys magnets!  Duh....
Two magnets are now gone, but at least I saw for myself what NOT to do with them.

That's still ok.  You can use another magnet like I did that will stick to both the "dead" magnet and the battery ends.  I found this out the hard way but, it still works great.

Bill

[WayneJT]

@All

I hope I am not too off topic here but I found this Circuit in the Silicon Chip magazine September 2010, thank you Jim, and will post it here in case anyone would like to have a look at it, it may or may not help in some way, its called the Magnetic pole and flux strength indicator, which could help with NS coils and gives a rough indication of the magnetic flux of a magnet.

wayne.

[electricme]

@protonmom
Thanks for offerring the camera boards, the microscope will make it much easier to identify what each component actually is. I will post here the results to benifit everyone here.

On the CFL experiment you began yesterday, hows it going so far?

@Wayne
Thanks for posting the circuit, I intend to built it, but it will be quite some time away though.

@Bill,
Thanks for your offer to help me out this morning, it's much appreceated.

jim

[protonmom]

I have been having trouble posting anything.  Keep getting bumped off.  I go to post and then my message is deleted and I have to start all over again.  Therefore it is hard to even try to get any messages to the forum.
The battery died out fully, somewhere between 8pm and 9pm.  I fell asleep so I am not sure exactly when it went dead.  But shouldn't the battery have lasted a lot longer than that?  Of course, it was used, and I don't know how old it was....and I didn't even think to check the voltage before turning on the light.  At any rate, I did manage to get a few hours of light off that AA.

[protonmom]

I replaced the battery in the protonM light and it has been running for 4 hours now and is still lit the same.  I cannot stay up any longer tonight (this morning, actually) so it will go out sometime while I am sleeping again.  The voltage, btw, was 1.46 on this battery before I turned the light back on.

Since I have only made it to around page 59 on the Jule thief forum (as far as catch up reading) I am really way behind.  But someday I will eventually get caught up.  Meanwhile, does anyone know if there is a way I can add something to the fuji circuit to make the battery last longer?  Or, if this has been covered, can you give me the page number so I can look it up?  Thanks.