Joule Thief

[Artic_Knight]

that would mean you you would have be beat me 0.19 volts at 0.20 ma Bright white 

Gadget

what did you do to get those results? i must have missed that post!  are you sure your drawing less than a miliamp? that sounds nearly impossible to get to work with the joule thief! i couldnt even get mine to resonate with current as low as 4v 1a

[mikem_2au]

@WilbyInebriated   
I just took another look at your
beer light, thats nice. I think I'll get a couple ccfl's,
but it will have to wait a couple of weeks.
I played with a Royer Converter a couple of weeks
ago (diagram bellow) it was working good, until a
battery went of with a bang, the negative end
poped open, not sure what i did wrong, but i'm
planning to give it another try. thanks for your
reply.

@xee2
I made no changes to your circuit, i was just moving
a couple of wires to change from the fuji circuit
to yours. Both circuits are working well for me.

mike..

[gadgetmall]

what did you do to get those results? i must have missed that post!  are you sure your drawing less than a miliamp? that sounds nearly impossible to get to work with the joule thief! i couldnt even get mine to resonate with current as low as 4v 1a

See . i told you . . yea you missed it alright . it was around page 100 . Its called Low power JT and the credit goes to mk1 and jeanna's secondary and me . I use a germanium motorola transistor hep638 and yes i am positive its 1/5 of a milliamp . this one has been running since i made it . I have it running 4 white leds now @ 0.80 milliamps at 0 .20 volts .
Good luck !

Gadget

[gadgetmall]

Al:

I am going to try to get some of these glow things soon as well.  I'll have to check into your tophat leds as I was not really impressed with the light output of the ultrabright leds I got form goldmine (they have 5 chips in them) rated at 265,000 MCD.  I compared them on the JT to the ones I got that were rated 28,500 and yes, they were brighter, but not enough in my mind to justify the additional amp draw.  My rough guess from eye observation might put them at 3 times brighter, but no more.  I believe they draw 100 mA's each to be fully illuminated.  I think I would rather have a bunch of the 28,500 guys before I got any more 265,000 leds.

How do your tophat leds compare to what we have seen so far vs amp draw?  (not actual amp draw, but their rating)

I am also not impressed with the 1 amp leds that are out there now.  Yes, they are bright, but, at what power cost?

I trust your opinion and if you think the new leds are something to try (as you just said) I will do so.  Thanks.

Bill

I have compared them to every led i have and there is no competition . the other high powered leds  look bluish beside this one . Its really white . google straw hat leds . the light dispersion is almost 180 degrees . I love em and i would trade my 200kmcds and every other leds i have for them .i have 100 . 20 k and they look so dull now . there expensive but  one is equal to a 20 watt light bulb if not more . the current is un noticeable on a secondary and i can light 5 in parallel no problem at 3.5 milliamps .  they are supposed to be 1/2 watt and 100 ma but they can run  on far less with our Jts..it all about frequency .

Gadget

[xee2]

@ mikem_2au

Thanks for posting your circuit. Mine was only an idea, I never made it. Can you light the tube with 1.5 volts?