Joule Ringer!

[27Bubba]

Hi All,

What about cutting large Tv yoke in half, would this work for the YT toroid? I successfully cut one with diamond cutoff wheel mounted on pneumatic die grinder while back.  It is very dusty job so do it in well ventilated space and wear mask...  Soon I'm going to wind one so I post the results and pictures..

[lasersaber]

Has anybody made a joule ringer with the base on the transistor disconnected?  Where you would normally put the resistor - just leave the circuit open at that point.  I have been seeing some very interesting results running my new joule ringer in this mode.  I will post a video update soon. This new design is super easy to build using standard parts.

[TimmyWah]

Hi all,this is my first post and I am not sure if I am in the right area.
I need to say "Thank you" to Lidmotor for suggesting "use anything you have".
Now this is a 273-1365A Radio Shack transformer with MJ13007 trans,orange 225ppw 100DC cap and a decade/resistor wheel.Running off an auto battery 14.8v-my meter says 12.6v.
After being annoyed about the price to import(Melbourne-AU)Lights of America LED's I came across GU10.
Have any of you worked with GU10's?
I did some comparison tests with CFL's also and am now sticking with GU10's.
I am posting this picture to show I am replicating and need help/advice.
Is there better transistors and caps to use in these circuits?
I am waiting for some IRF530's to arrive and will try them with an inductor on the base.
I have also ran this circuit using a AA1.5v joule thief and 5v cell phone chargers,but I might stick to auto battery as I may change to 12v SLA for Solar.
Any help kindly appreciated,
Tim.

[Peanutbutter29]

Just wanted to say thanks Lasersaber for the super efficient circuit.  I've been using it for battery testing and it works well. 

Also, I tried another coil for the driver (as I'm playing a bit) that seems to work well. It won't turn on at quite as low of voltage as with the ferrite in your circuit; but seems to work through and past LED conduction?!  I posted a first video just to show what's going on, but ya;  need to test some more. 

It shows the same basic circuit. Power in across a 10uF, and same 2n2222a and same 5M dual audio. I changed the cap across pot. to 10pf.  And these two flat coils are laid for opposing winds.  I say in the video what's connected where for the coil. 
http://www.youtube.com/watch?v=wTvnL2HMVow&context=C4c1290aADvjVQa1PpcFPFfx6ZklIUC1rsLOrQVBXU4ajj1gGHw24=

I'm going to play around with some other things, but I wanted to post this curious effect too. 

Thanks

[Peanutbutter29]

I added a dc converter- rectifier output to the circuit I posted, that seems to work well!  I believe I give all the values for things in the video.  But I was able to light 5 leds (startup min.) at .9v and at 3.6v it draws about what 1 LED is rated for.  Seems to allow for a very smooth and fairly regulated output (about 1v variation on the output with about 4v input change.  I didn't point in the video that there's an extra 640mv drop across the 1N914 diodes in the rectifier
  I dunno, maybe adding this onto some of the JT circuits can help for powering small loads that need DC.  I imagine you could run pulse and timer circuits off it, who knows.  At least it's not clamping the V rise across the CE bridge anymore, yay!  just playing around I supose. 
http://www.youtube.com/watch?v=ElLQWP3MYKI&context=C440043bADvjVQa1PpcFM_FOEtEp-AEsEAWqO00PXaWjC48gIdryc=
maybe it can help.
Thanks