Joule Thief

[IotaYodi]

So, when does a transformer not act like a transformer?

If you use non pulsed dc current it acts like a regular coil and will just heat up.

[jeanna]

Iotayodi

Your story is interesting and exciting, but...

we are NOT dealing with wall current. 50 volts from the wall is not what we are talking about cuz when the wall goes through your body to the ground it is entirely different from touching the wires.

I tried to stop an electrician from changing the wires while hot and he explained that as long as he did it one handed he would be ok.
I did not watch actually. I did not like the idea because a burn is possible.
BUT that might be so for someone who is using a frequency generating machine that is plugged into the wall as stprue is,
Is that the same for you?
Are you also not using a 1.2volt battery?

But a camera will NOT NOT NOT kill you.
Nothing can cause fibrillation unless it is crossing the chest, because the signal of the heart is in the chest and not effected by what happens to the hand. ... but, of course,  the spark can be hot and the wall can burn you.

---
On the q about transformers, I am using pulsed dc at 133khz and it did not transform.
Gary also mentioned this, but no one has made an explanation.

Is this not a curious thing?
Is there any other time this might happen?

jeanna

[IotaYodi]

But a camera will NOT NOT NOT kill you.

I agree. The post I made was mainly for safety with high voltage. Your right hand still should be used when working with it. That includes hv capacitors. Being a hand or any part of the right side of the body is a longer path to the heart. That gives you a few more milli seconds to disengage from the circuit which helps.

On the q about transformers, I am using pulsed dc at 133khz and it did not transform.

The only thing I can think of is that the dc pulse is too fast and the field is not collapsing fully. With AC the voltage always drops to zero to collapse the field. I would slow the dc pulse rate down to see what happens.

[Mk1]

@jeanna

To be honest i had to do it more then once.

The first one the regular rodin i used the drawing following drawing http://www.rialian.com/rnboyd/rodin1.jpg

i did both wires at the same time , after charting and tagging numerically the winds location , to get a clear picture of the angles , i guess you could also mark the toroid 360/12 .

the picture is not showing the pickup coil because i removed it but it was over the rodin.

the second one i first put on the pickup coil 48 turns ,i used a bigger size toroid .

then spaced the 48 turn at every 4 turns making 12 spot where to put the rodin wires ,

this one i did the first wire then the second over it , to do it a made 12 new space in the middle of the 4 winds i did before .

It is sometimes hard to do cleanly and don't get a big knot in the middle , put it should be ok if you make sure to pull the wire trough the middle of all wires.

I used a small screw driver the get the middle nice and round .


note Rodin usually have 12 turns bifillar and go around about 20 times on a air core.

the symmetry he uses is the same but i reversed the second wire and go on my last one , and only go around once making it a 1/4 ratio 12/48.


i hope this helps

Mark

[jeanna]

...
  The only thing I can think of is that the dc pulse is too fast and the field is not collapsing fully. With AC the voltage always drops to zero to collapse the field. I would slow the dc pulse rate down to see what happens.

That is a good explanation.

Unfortunately I cannot change the pulse, now.
I have the pre set pulse from the transistor, which is being used to light 24 other lights.
I am trying to add more lights. I added 2 more the other day and I was hoping to be able to continue to add more than that.

I was able to raise the voltage to 7.7volts at 133KHz using 56 turns on the step up side from 20T on the down side. It worked properly. 20T:56T went from 2.36v to 7.7v.

I hope I can find something better than 7.7v. I did skip from 56T directly to 200T, so I guess there is only one thing to do now...

thank you,

jeanna