Joule Thief

altrez · February 23, 2010, 06:33:25 PM

@all

I have been having some great results playing with the TDK board from EGM. However i can not get a JT to power it like some of you have done. I tested the JT and its putting out 10 volts DC on a secondary and i can see 100 ma draw when I hook up the TDK circuit. However nothing on the HV out?

Any ideas?

Thanks!

-Altrez

xee2 · February 23, 2010, 06:48:56 PM

Quote from: altrez on February 23, 2010, 06:33:25 PM
However i can not get a JT to power it like some of you have done.

Who did that?

altrez · February 23, 2010, 06:56:06 PM

Quote from: xee2 on February 23, 2010, 06:48:56 PM
Who did that?

I thought you did with the aa cell phone charger right?

-Altrez

xee2 · February 23, 2010, 07:10:51 PM

Quote from: altrez on February 23, 2010, 06:56:06 PM
I thought you did with the aa A right?

-Altrez

Cell phone charger is not really a JT. It is much more efficient at power conversion. But it does do much the same thing.

But, you should be able to light a fluorescent tube using a cell phone charger with TDK board. If the tube does not light, try a neon. If that does not light something is wrong.

Are you the person who said he was running the TDK board from 9 volts? If so how long did you run it at 9 volts?

altrez · February 23, 2010, 07:20:04 PM

Quote from: xee2 on February 23, 2010, 07:10:51 PM
Cell phone charger is not really a JT. It is much more efficient at power conversion. But it does do much the same thing.

But, you should be able to light a fluorescent tube using a cell phone charger with TDK board. If the tube does not light, try a neon. If that does not light something is wrong.

Are you the person who said he was running the TDK board from 9 volts? If so how long did you run it at 9 volts?

Yes i always have ran it at 9 volts and have ran it for more the 2 hours at 9 volts powering a tube and a least 50 leds via wireless or SEC works perfect and never had an issue.

Still confused as why the cell charger outputs more energy then a JT? Is the Cell charge simply doing DC - DC conversion? If so then I totaly understand why it would work.

But again I can light 30 leds off the ground connection on the battery from the TDK. and I can get around 3 foot wireless from it. I think my big 8 foot tube is acting like a massive broadcaster lol.

Oh and when I connect to the negative of the battery's ground and light all the LEDS it draws no current or any more voltage. Its really easy to test sense you have one on hand. I bet I could light over 100. It needs the AV-plug to work.

-Altrez