Joule Thief

[innovation_station]

i have played with all of this stuff



all i have showen i have built months ago....


aside my pwms   and digital curcuits im learning all that stuff now 


peace

ist!

[Groundloop]

@Slayer007,

I'm not sure what circuit you are looking at but if you are looking at
the Kodak funsaver camera circuit then the resistor is 82 ohm. This could be wrong
since my crappy multimeter is not accurate when measuring a resistor that is soldered
into the circuit. I looked on the net and some circuit drawings says 220 Ohm. I think
the circuit will work with any value in the range of 80 ohm to 1K.

@nievesoliveras,

The resistors used in the 2N3055 circuit is 270 ohm and 27 ohm both 5 watt. The important
thing is to get a 1/10 voltage divider for the base bias. So 300 ohm and 30 ohm will also do fine etc.
But if the values is too high then not enough current will go to the base and you loose output power.
I apologize for the bad hand drawing. I will make a better drawing of this circuit and post it soon.

@WilbyInebriated,

Yes that make sense. I think we just misunderstood each other. As you can see from the text above, I'm still
uncertain of what value that resistor are. The circuit is performing great for such a tiny size. Think of it,
the output coil is made of very thin copper wire and still that thin wire can transfer approx. 0,5 Watt to the light tube.
Have you tried to use Windows Paint when drawing circuits? If you use a lot of copy and paste then you can get very
good drawings. I use Paint for small drawings and convert the drawings to gif format to reduce byte size. I will do
more testing on your circuit this weekend. The circuit is like a small Tesla coil so I think it can do many other tasks.
Sorry for my bad English.

Regards,
Groundloop.

[Groundloop]

@nievesoliveras,

Attached is a cleaned up version of the medium power inverter.
If you find any errors in the drawing, please notify me and I will
correct the errors. Various cores can be used for this circuit.
The resistors can be of higher values so that the circuit will
use less input power. Just use resistors that gives you approximately
1 to 10 voltage divide so that the base of the transistors get a little
higher than 0,7 Volt. If you use a Ferrite core and get high enough
frequency then the fluorescent tubes will light up with just one wire
connected. You can also put more than one fluorescent tube at
each output wire. I have not tried to find out how many you can use yet.

Regards,
Groundloop.

[nievesoliveras]

@groundloop

Thank you for your answer!
Also for the new drawn circuit!

Jesus

[slayer007]

@ Groundloop


Yes thats what I was woundering.
Thank you Very Much for your response.