Joule Thief

[Pirate88179]

Conrad:

That is probably correct for an air core.  The thing is, I am using an iron core as the battery has a good bit of iron in it evidenced by how I can use my magnet battery holders to attach them to my projects.  Now, it may not be that much iron and it may have terrible permeability properties making it closer to an air core.

I do not disagree at all that it might work if I had more than my 400 windings on the hv side.

Thank you.

@ All:

Lidmotor just posted a video where he got this to work using a button cell and an AAA battery also:

http://www.youtube.com/watch?v=lpGgB2gxxQk

Man, he does great work over there.

Bill

PS  Slider has posted this video where he uses the battery as a core as well.  He did this in response to Lidmotor's video:

http://www.youtube.com/watch?v=DjV2qG3xO5o 


***EDIT***

Apologies to Conrad.  I just now noticed that you already posted Sliders video link.  Sometimes I just need to slow down and pay more attention.  Sorry man.

[Pirate88179]

http://youtu.be/d31iEWBMh3M


Here is a short video on how to make our universal magnetic battery connectors.  I have been using these for years and have refined the procedure and materials so now they are cheaper to make and work better.  Lidmotor mentioned these in one of his recent videos and I thought that it might be a good idea to show folks how to make them in case they did not know.

Bill

[NickZ]

  Nice video Bill.  One advantage that I can see in going that route is that any 1.5v battery will work on it. AAA to D size cell will work, without being restricted to use just one size of battery, as when using the ready made plastic battery holders. Plus it looks cool, also.

  NickZ

[Pirate88179]

Thanks Nick.

Yes, that is true...it gives great flexibility for those folks (like me) that get discarded batteries from their friends.  I wanted to add in the video about using small neos to mount the battery in the project case.  I forgot while filming.  This also allows any battery to just be "stuck" inside the case and you are good to go.

I got the magnets while shopping here at the Overunity store.  One of the links there had these magnets very cheap.  I bought 100 of them.  Very strong little boogers.

Bill

[bmind23]

If I had a time. I willl show you my version of joule thief. Fluorescent lamp 23W 230V flickering on 1F supercapacitor. Lamp is unmodified