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Overunity Machines Forum



Joule Thief

Started by Pirate88179, November 20, 2008, 03:07:58 AM

Previous topic - Next topic

0 Members and 79 Guests are viewing this topic.

stprue

Quote from: Mk1 on November 29, 2009, 03:54:47 PM
@stprue

The test i have done showed that the coil inside the toroid worked better , it seems to be trapped there , and its not pushed out .

I have been thinking about this after I saw a vid on a rodin coil.  The inside current of the coil was really high while the outside current was really low

EDIT:

Here is the vid

http://www.youtube.com/watch?v=t1AQ5acpawg&feature=related

broli

I tried doing a thread search but it didn't end up good. Stefan if possible can you look into this feature, it would help a lot with for behemoth threads like these.

What I was trying to look for was the term "saturation" and read what people have talked about. So I'm sorry if this is a repeat.

I have read many explanations of the JT and I think all of them use the principal of core saturation. But I have been looking at the specs and started wondering whether the battery could in fact saturate the core before it saturated the transistor. And I believe the answer is no in most cases. I think this is why people have different results using different transistors without changing the setup. For instance jeanna's voltage increased quite a bit with a high current transistor, to me this shows that the core is not being saturated with low current transistors and thus the highest possible voltage is not reached.

There are a few ways to test this with an oscilloscope.

jeanna

Quote from: gadgetmall on November 29, 2009, 03:28:52 PM

@jeanna . I wound that big toroid but i went 420 turns . I did something wrong because i only get like 2 volts  ? Maybe 420 is way too many and snuffed out the resonance ?

I bet it is shorting somewhere.

First, I must ask if you tried just the jt part, and does that turn on the light in the basic jtl place?
Then If it does, I think you probably have over 1kvolts and there is a breakthrough somewhere in the insulation.

I don't need to remind you that the 30awg radioshack will do that but I have seen many scratches appear in the 27awg too.

If it is 2 volts the spark might be right at the beginning.

Is this a tor-60? or a look alike?

jeanna

gadgetmall

Quote from: xee2 on November 29, 2009, 04:04:01 PM
Try reversing the pickup coil leads when you make your voltage measurements. There is only high voltage one way. You are using a diode and cap and DC setting aren't you?
Hi Xee2 . I like you Design .I realize its probably Drawing 200 Ma with that low resistor but still its a start and a first i have seen . I wonder if yours will light two in series ? I think i double phased it by going over the first layer . DID you single layer or double layer  ?I used a diode and oled one meter had to change to a fluke with 2000volts max . getting a HV but no push .

Al
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Mk1

@gadget

Winding back and forth , or all the same direction ?

You could tap it at the middle and go pancake style , or use both center tap.

Mark