Joule Thief

[drodenbe]

Sorry,  forgot to label the capret.   It is a 470 uf capacitor at above 25 volts.  Thanks again. 

David

[Bob Smith]

Nice to see you back, Drodenbe.
Thanks for sharing this. I was wondering when someone was going to come up with a use for these coils and cores.  There are many off the shelf parts that can be adapted for effective use in systems - we just have to have eyes to see their potential, as you did.
Bob

[Pirate88179]

Hi every one!  I am a newbie to posting stuff but not to electronics.  I just wanted to share my findings I have been working on for several years and just recently was successful in a joule thief design that will run a LED brightly and charge the battery at same time.  I am currently running on a crystal battery I made and it too is a new design quite successful so far.  So I am posting my circuit and feel free to try if you want.  I also included the formula for the crystal battery if interested.  For more info on the battery go to the crystal battery forum under Fausto.  I have posted how to make it.  It is different than others.  So that being said,  here is the post.  I also included a jpg of the coils I am using although it works with standard joule thief cores.  It also works with air core as well.    Thanks.

David

Nice work.  I especially like your idea of sealing with wax.  Easily obtained, easy to work with and it seals.  Eventually, you might want to move on to something more permanent like the clear epoxy or resins being discussed in the other topic but, for testing and prototyping, your wax idea is excellent I think.

Bill

[drodenbe]

Good to be back.  Surprised anyone remembered me!  Went through a divorce,  lost all my stuff!  Relocated in a different city and started over.  Retired and on limited funds.  It is slow but I am getting there!  No big deal.  Been here, done this before,  won't do it again!!!! 32 years first time, 2 years second.  Not sure what I was thinking!!!

I used the wax because I had some old candles around and that is all I could afford at the time.  Next month will be my recovery month.  I usually use epoxy resin.  I know this is not the place to discuss the cells and I won't do it again and apologize.  But!!!! Look at this video and talk to me about it in the crystal cell forum if you want.  https://www.youtube.com/watch?v=u7y8ek9aASQ.

http://www.overunity.com/13061/crystal-cell-research/new/#new

David

[drodenbe]

One other thing about the joule thief.  The use of the other jt coil in series with the supply really makes a difference whether you charge or discharge the supply.  I didn't use a capacitor across the supply side because I was trying to get a inductive kickback into the battery and this seams to work.  The addition of the capret just made the process better.  I was surprised to be able to run the led at the same time.  I have worked on this for some time and could not even get the circuit to last any longer than 1 hour before it started to discharge the battery,  without the LED.  I even tried a super cap across the input but it just delayed the action.  But this formation of components seams to work quite well.  I have had the circuit running for weeks and not discharge the battery.  I even wound a jt coil with out a core of 60t and 20t around the outside of the crystal battery and it still charged the battery.  It was not as efficient but it still charged it.  Just took longer!
I got the idea for the capret when I was using these little wonders to keep various batteries charged while running a jumbo led.  Have had about 8 different style batteries in various combinations running for over a month and the batteries have not gone down.  I even hooked one up to an old discarded 6v drycell that was below 6 volts and it brought it up to 5.93 volts and has been there for a month.  So why not try to use it in a joule thief circuit.  That is when I came up with this configuration and surprise, surprise, surprise!  As Gomer Pyle once said!

Well try it and see if you like it!  Ha Ha!