Joule Thief

[xee2]

@ ist

Wow    499 volts. Can you provide more details of what you did?

[sparks]

    On the jule thief unmessed with how high does the cap voltage charge to?

[innovation_station]

im still trying to do it agin i had it down pat than it i move the magnets i was useing 2 of them but after it was going i could take the 1 away ..

out put did not drop ...

strange ...


ist

the ear pericing squeel went silent as the voltage instantly rose .....

im guessing it went into a high speed rotation ....


weird if you hook anything to it it kills the effect ..  humm

[jeanna]

Yikes! I gotta catch up!

Jim, There is a website called treehugger, I think, where the good folks there used a hamster wheel connected to an induction generator to run the lights for the hamster room. pretty funny. Maybe your mice in a cage could be put to useful work? 

@jesus, Thank you for making the change and yes, it was a good idea to mark the ends. It is most likely because I am a noob at these things... I cannot find it today, but yesterday I found a site that explained that the voltage mattered more on the collector? was it? I wish I could find that reference today, but see, it makes me think it is the reason our voltage spikes from the toroid are able to do what we are finding. I think in that reference he said the E was affected by current, and the C by voltage - but I may need to edit this if I am wrong.

So, since there is a reason to believe there may be a difference, thanks for posting it as I have actually put it together.

@xee,  I  have it connected so the E is going to the neg- of the battery.

@MK1, I have a 2N2222 so I will be trying this with my breadboard circuits, and I will be back about it.

@all
here is an experiment i am doing using a very large toroid wound 4 20 t = 80 turns . battery is .90 volts it was drawing 11ma lighting all 4 leds . i put a capacitor across the pot i am using to adjust the Bias to base of germanium transistor and the current dropped to less than 3 ma doing the same job of lighting all 4 leds bright So now i have 4 leds running at 2.85 ma with a dead battery .just by adding a capacitor in this circuit .I can adjust the current draw to 1 ma and all 4 leds are lit approx 20 % bright . Very Interesting . I don't know of anyone who has a circuit that can light 4 white leds bright at less than 3 ma

Well, if you are using the secondary to make the lights, I can. I had 30 lights where the total was 23mA so divided by 30 that is 0.76mA each. or 766uA each.

So, gadgetmail, please give a couple of details, how are they wired to be turned on? If they are a part of the original jt circuit, this is a really big difference and you are putting us another big step forward!!!! yeay!

thanks,

jeanna

But I think

[jeanna]

My apologies to everyone,

I appear to be hopelessly confused about the transistor symbols. I don't know if I will ever be able to clear it up.

Anyway, Jesus, your first drawing was correct.

The emitter goes to the neg of the battery, and the symbol is as you had it. Of course, you were right.

(In a little explanation, which none of you need, of course, it all started after the second lesson 5 years ago. I was fine with following electrons around a circuit, but, all of a sudden when the explanation started with transistors, the current was changed to conventional current and I was now supposed to follow the protons going around the circuit and the symbols and their wonderful arrow pointing the way had to be reversed  and Oh my goodness.... )

So, again I apologize.

The Emitter goes to the negative!! whatever that looks like!

jeanna

Yes, jesus, you may delete the wrong drawing.