Joule Thief

[Goat]

@ All

I can see this thread progressing towards solar for recharging the battery during the day and running lights at night to state the obvious, that's why we need lights 

If we make the best JT or other mod work to recharge more than one AA battery during the day depending on how big a solar panel we have then that's many more batteries and lights at night

Another thought that came to my mind earlier, (And please don't try this) is to take a battery and inverter and put that through the JT toroid instead of the transistor circuit, keep in mind I'm talking about a small 12 V battery and a small inverter 

Just throwing a few ideas out there.

Regards,
Paul

[Pirate88179]

@ Gadgetmall:

Ah, you asked the million dollar question.  This tubing is just clear plastic stuff that comes on a roll.  OK, I took an old tomato sauce can and wound the tubing around that.  No, it does not want to stay, so, I took some superglue and spot welded the coil joints and let them dry.  (a small drop in a few key places just to hold its shape)  Then, I could let go of the can and add some more superglue along the joints.  Once it all dries, and this takes a while but that is fine as I didn't have to hold it any longer, I just unscrewed it from the can and.....there it is.  Not very high tech but, it works.  I made it up as I went along.  Very easy and cheap to replicate if anyone wants to.

Thanks to all for the compliments on my latest video.  I really appreciate it.

Bill

[jadaro2600]

Has anyone tried this without a ferrite core - perhaps a metal washer or a rod instead?

[Pirate88179]

@ jadaro2600:

Yes, MK1, and others, have used powdered iron cores and proved, at least to my satisfaction, that ferrite is not required.  His comments on this are listed....well....somewhere back in the many posts we have here.  I even think someone made an air core that also worked, but I cannot recall who or any details.  To me, with what I know about the JT circuit, I think it is all about matching the core and the transistor and the resistance to achieve maximum output.  A balance of all of the variables.

Bill

[electricme]

@Bill
I'm stuck

I just noticed your comment about balancing the core to all the other variables,I stuck on knowing how to tune the core so to speak, any ideas.

General Jim

I got 2 green cores unwound, thought I would have had them wound by now, there was black glue substance in them, it held me up.