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Overunity Machines Forum



Joule Thief

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

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jadaro2600

#4845
April 10, 2009, 11:32:16 PM
Quote from: dog812 on April 10, 2009, 11:25:23 PM
I have tried using a resistor , the smallest one i have is a 47 ohm.. And the yellow , orange will light up.. but very dim..
Will a smaller resistor work? Like 1 ohm ?

Also what are caps used for.. i plug a cap in the board and it turns it off.. I put a 47 ohm resistor on one side and plug it in and it stays lit but dim.. ?

I heard somewhere that you could put two like resistors in parallel and half the resistance of the one.

dog812

#4846
April 10, 2009, 11:36:45 PM
Like one on the positive and one on the negative? or 2 in line together?
Sorry i dont know what that means?

jeanna

#4847
April 10, 2009, 11:37:14 PM
You don't need either of those if you're doing the lights off the secondary, which you are.

If you were to use capacitors you would use them to smooth the wave. I think you will lose too much light because the cap will tamp down the high frequency effect. I am no expert on caps, and I probably shouldn't be answering you, but I am pretty sure you won't benefit from either.

Definitely not the resistor. I used that because in a normal dc type circuit the led will not light with 1.5 volts. So, I needed to use 2 AAA's and a resistor. you literally burn the materials inside the led when you use 3 battery volts with no resistor.

It is the amps that burn the led. the volts we are discovering more every day... more to come ;)

jeanna

jadaro2600

#4848
April 10, 2009, 11:43:24 PM
Quote from: dog812 on April 10, 2009, 11:36:45 PM
Like one on the positive and one on the negative? or 2 in line together?
Sorry i dont know what that means?

Twisting the leads of the resistors together. ...treating two as one, they will be side by side, ie, parallel.  ...series is one after another.

| |  < parallel & series > _  _

dog812

#4849
April 10, 2009, 11:45:15 PM
I am not using the secondary right now.. just a straight JT with 6 paired turns..

I found that the secondarys i tried didnt light up bright enough .. and were too time consuming to make..

Unless you know of a easy jt with secondary that will work for me?

I tried both ways with the resistors.. it made no difference with the amount of light ...

but now i added 7 more LED's 4 red, 3 orange, up to 49 off one  recahnrgeable AAA .. so we'll see how long it lasts ..


I still need to make them brighter if i am going to use the JT in my hula hoops.. http://ledhulahoop.com
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