Joule Thief

[Pirate88179]

Thank you all for the congratulations on the scope.  It does not come with probes so I will have to find the correct ones.  I do realize there is a large learning curve here so, don't expect any fantastic results from me right away....(or ever maybe?)

Since I have started playing with the JT circuit, a lot of folks on youtube and elsewhere always seemed to ask..."Can you post a scope shot of that?"  And maybe, soon, I will be able to.

Thanks again to all of my friends on here who have guided me, and helped me with the scope purchase.  In no particular order: MrMags, Jim, Jeanna, and also to my friend and associate Gary, (retired Military Intelligence) who taught me in the last few hours how to post a higher bid in the last 20 seconds.  We will see what happens.

Bill

[xee2]

@ jeanna

author=jeanna link=topic=6123.msg169307#msg169307 date=1239165005]
This way, there is still a connection of sorts, but with the meter "in between" the parts that should be connected. This should tell me what is happening volt-wise at that connection place.

I think part of your problem is that you are not measuring voltage correctly. If you measure the resistance between the ends of the two voltmeter leads while the meter is set to read volts you will find it is thousands of megohms (very close to an open circuit). So you were putting an open circuit between the two points that were suppose to be connected. To measure voltage the meter leads need to be placed in parallel with the device you want to measure the voltage of. Like at both ends of a resistor to measure the voltage across the resistor. Your measurements are going to be meaningless until you learn how to make them correctly. Actually, I know that you do know how to make them correctly, but you seem to forget every now and then.

EDIT: Then again, maybe you were doing it correctly if you wanted to find the voltage between those two wires. But since the two wires were no longer connected, the circuit was probably no longer working and so your voltage measurement was still probably not what you wanted. As you can tell, I am confused about what you are doing.

My apologies if you are doing it correctly and I am just too tired to think straight.

[jeanna]

@xee
2 nights ago I received a reply from MK1 that made me want to make a device like his to capture my output from a copy of his coil.

He said something I could not understand. Partly it was the english and partly it was my lack of experience with electronics. Maybe you can understand it and shed some light for me. He said:
===

"i think the cross winding help keep the coil pushing and pulling (not just pushing) and help to keep the wave integrity
giving a better charging and robust current.

Also , i don't know about adding current in the jt coil , but a positive feedback on the pickup coil works well , you need at least 2 pickup coils but 4 is better and a bridge of diode .

You rectify one pair and send the positive from the bridge into the second pair , then the negative on the bridge and the out of the coil and your coil output ."

===
Since that time I have been doing my interpretation of what he said to me and then doing it again and again. I can't explain it at all. But, maybe you can. I appreciate help, here.

As I mentioned before, I am trying to get that string of lights to light since 108 volts across the leads of the 2 secondaries connected in series ought to be able to do that. - but didn't

thank you,

jeanna

[electricme]

@ Stprue,
Welcome to the forum. 

Please forgive the lack of manners of all here not welcoming you earlier, dreadful.        lol

I have been playing catchup, which means I have been away for a few days and have to read up on everyones posts, thats how I came to notice your presence and the lack of a welcome. (just keep looking, you will be blitzed with welcomes now)

Phew, this thread hasnt got out of top gear, it's well and truly oiled and tuned lol

Stprue, nice to know you have decided to make a JT, please post your results, ask questions no matter how out of left field they may seem, you never know, you just might give us all a breakthrew we need, theres lots of knowledgeable folks on here who will jump for joy to help in any way they can. 


jim

[xee2]

@ jeanna

Please see the apology I added to my previous post. For the same reason (I think I am too tired to think straight) I do not think I should try to figure anythink else out tonight. I will look at your post again tomorrow.