Joule Thief

[innovation_station]

i have managed to spinn my a$$ in gear... lol

getting the shop set up .. the construction s not all done but what ever .. 

time to build darn soon...   just dusted off the scope and im a fire up the comp coil tool...

and the first GREEN ENGERY DONATION ROLLED IN THE DOOR  some green wire..

i expect to be up and fully funtionable tomorrow ...

get tee up! 

w

[jeanna]

Gary it didn't help.

I just calculated the difference in the cubic inches of gas that must light up and the difference in these 2 tubes is a lot.

36w 4 ft tube
1.38 diameter x 47 in long =
0.69*0.69=0.4761*3.14=1.49 in area*47"length=70 cu inches.

growlight
1 inch diameter. x 17 in length=
0.5*.5=.25 in *3.14=.785*17=13.345 cu inches

So there is 5 1/4 times as much gas to heat and vibrate in the 47 incher as there is in the 17 inch grow light.
I bet I am igniting the same amount of gas. The ends glow bright and about 12 inches.

I just calculated one 5 1/4 th  of the length of the 47 inch tube is about 8.95 inches, which is definitely what I am able to light.
I will buy a tube of an intermediate size tomorrow if there is no storm.

Thank you for those suggestions.

jeanna

add
@Albert

I must know exactly how this one works . I have all night to myself tonight and i want to Wind / three" first . I'll go with what you Pm'ed me and reduce to 6?
Albert

Make it centertapped in a line as you described it the other day and make 2T and 8T then reduce it to 7T then 6T.
Your transistor could be different.
The base looks like 50ohm
The cap at the base was a 105 = 1000000pF=1uF for best results on this big one.

let me know!
j

[hartiberlin]

By the way,
sorry, I have not kept up with this thread for some while,
only lately,
but has somebody already tried to modify a car ignition coil
with winding a small pickup coil additionally onto the core
of the car ignition coil and use this coil for the basis of a JT transistor ?

This way you could also get the car ignition coil to work like
a JT and you could use the high turn high voltage coil as the output
for fluorescent tubes..

I know that imhotep did simular work, but I guess he used
no modification on the car ignition coil,  but just pulsed it with
a 555 timer, when I remember correctly...

Has anyone tried these CCFL tubes for PC modding ?

These put out very bright light ( don´t look longer directly into them,
I almost got blinded by them once !)
and the electronic inverter used there from
12 Volts DC to light up these bulbs is simular to a JT.

You can also hack these and enhance them.
They are also pretty cheap and have a great
ferrite transformer in them.
These put out also around 30 Khz 600 Volts spikes.

Please post videos of your success lighting up CCFL tubes
or fluorescent tubes or LED series chains with it and just a AA battery.

Regards, Stefan.

[hartiberlin]

I think,
we must find the best cheap transistor or MOSFET to switch
very fast the primary current on and off in a JT.
This will give us the best secondary induction voltage and it seems,
the higher the induction voltage is, the better will be the light output
from fluorescent bulbs and CCFL bulbs and LED chains.

So what would be the fastest switching standard cheap transistors or MOSFETs to use
for this ?

[Pirate88179]

Stefan:

Yes, Wilbyinebriated made a nice project from a small beer keg and used the jt circuits and ccfl's to make a really cool light.

Wilby, if you see this, please post some photos of your light again, that was a great project.

Bill