Joule Thief

[xee2]

@ jeanna

I just don't know how to preserve the transistor.
Someone on another thread said to put a cap in parallel with it and I guess if I put a cap across the C-E it might help, or just across the base resistor. I don't want to go frying transistors without a better solution in mind.

You can protect transistor by putting neon between collector and emitter. But I could not get the ignition coil to work as a JT. Good luck.

[Pirate88179]

Thank you Jesus!
That is perfect.

I made a movie of the earthquake spikes.
Here it is:
http://www.youtube.com/watch?v=NJoPspdYyYU
Now, I will go and see if it came out all right!

jeanna

Jeanna:

I can see the spikes too. Great video! I just want to point out that this was Jim's (Electricme) idea from the start to look for natural anomalies to see if they affected our scope shots. The credit should go to Jim. 

Bill                

[resonanceman]

Gary,
I am not sure how you hooked them up to a joule thief?

I am thinking the ig coil IS the toroid of the joule thief.

I just don't know how to preserve the transistor.
Someone on another thread said to put a cap in parallel with it and I guess if I put a cap across the C-E it might help, or just across the base resistor. I don't want to go frying transistors without a better solution in mind.

Any ideas?

jeanna

Jeanna

I  just used  the  ignition coil as  an inductor  for  making flyback
I connected  one  wire from  my secondary   to  one of the terminals for the primary  and   then I  connected  the load to the   secondary .
So  the coil  was   in  series   with the secondary .


I thought  about  trying to make  a JT  with  the ignition coil .     
I gave the idea up ...... if it had  another  primary  terminal  it might work .........but as it is  I see no practical way to make it work.


What  I have been wondering  about is  if it would help  add flyback   if  we were to  try  running  the ignition  coil    more as it was designed .
I am talking  about  still hooking it up as I did   using one   terminal  of the  primary  and  the  high  voltage   connection   for  the  other connection .
What  I wonder is   if  anything  can  be gained by using the  second  primary  connnection to  charge the  coil like   it would  be in a car .

I am thinking maybe  a high  voltage  diode and  a pot  between the  battery and other  connection to the primary . 
Then maybe  a  high voltage cap after   the coil . ....to  keep the battery from  driving  the load directly .
Just thinking about it ......I have not  tried it yet


gary

[jeanna]

@ jeanna

You can protect transistor by putting neon between collector and emitter. But I could not get the ignition coil to work as a JT. Good luck.

hmm I have so much to learn!
I wonder if 100 base turns is too many for the transistor arrangement etc.
I just learned that a higher value inductor in series with the leds of the S1 Secondary of my 2 secondary circuit freed up a LOT of power for the other S2 secondary. - a lot.

I just read that Gary is putting it in series with the secondary, I think there is more to learn and expand here.

thanks,

jeanna

[Mk1]

@all

I just found this ...

http://www.rexresearch.com/szili/szili.htm

toroid used http://www.ferroxcube.com/prod/assets/tx20107.pdf