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[jeanna]

I took Lidmotor's rheostat idea, and applied it to my JT circuit right after I got done playing with your CFL circuit. (I'm assuming that you are indeed the same person I watched on Youtube) The led is lit even at the lowest setting.
So I replaced the rheostat with a 22 ohm resistor, and used a 1k ohm resistor in the standard JT circuit with one of those clamp on toroids found inside Televisions, and it has run for over two days off of a 1200 mA NiCd battery. The current draw is at around 12mA. I had to break out the analog meter, as the digital cannot register any current flow at all.

Yes, the rheostat at the pos end of the circuit makes a huge difference!
I forgot about that element.
It is very significant, although Lidmotor seems to believe this is the same as the base resistor, I do not; and, using just a little resistance at the pos of the battery can make the difference of maybe 3 times the life.

(yes, I am probably the person you saw on youtube.)

@pirate88179
Yes, Bill,
I am also talking about the secondary running the light, because in its normal configuration, it seems to require a tad more voltage for a good spike than the very basic jtc with the led across the transistor C-E.

And, I also agree that turning it off for half a day can make a big difference.
All the same, that jtc you made for your mom is very impressive.
The proportions of that 'bead' are quite different from any I have used, and, perhaps it holds a secret for longevity??

Just to define the comparison,
I am comparing a 750mAH AAA running a jtc to 2 of the same size AAA's running a dc circuit.

In my experience
The usual jtc with secondary stops after 10-15 hours of continuous runtime from 1 AAA.
The 2AAA standard circuit works for months without ever turning it off. (only the white works like this.)

thank you,

jeanna

Oops, sorry jesus, this is way off topic. I am not feeding this back to source. 

[nievesoliveras]

Lady @jeanna.

You are an experimenter and always look for the truth, your posts are welcome here on or off topic.

Jesus

[Magneticitist]

in regards to the joule thief argument, i believe most of them will not last as long as just using two AA's because for one, two AA's contain more current, and two, the JT may be pushing the AA's current at 5V or more as opposed to the 1.5V its rated at. (which as someone pointed out is why it works on "dead" batteries..) this would also depend on how hard the transistor is switching etc.. i believe a JT can be made to last alot longer than using 2 AA's.. but essentially that means the same thing can be done using the two AA's and a frequency adjustment.. so the argument turns into whether or not one power source can outlast another greater power source.

the thing i like about the JT is that it can be made to run from practically NOTHING. it may not turn a motor,  but it will definitely create useful light from LED's or even fluorescents.

two AA's may light some white LED's brightly for a long period of time, but a flash circuit using one AA can convert that current and light hundreds of the same LED's brightly for a week.

the benefit of the JT comes in when you take into account it can be made to oscillate from under 1.5V input, as opposed to the two AA's failing to light the LED's as they fall below a combined 2v or so.

[Pirate88179]

in regards to the joule thief argument, i believe most of them will not last as long as just using two AA's because for one, two AA's contain more current, and two, the JT may be pushing the AA's current at 5V or more as opposed to the 1.5V its rated at. (which as someone pointed out is why it works on "dead" batteries..) this would also depend on how hard the transistor is switching etc.. i believe a JT can be made to last alot longer than using 2 AA's.. but essentially that means the same thing can be done using the two AA's and a frequency adjustment.. so the argument turns into whether or not one power source can outlast another greater power source.

the thing i like about the JT is that it can be made to run from practically NOTHING. it may not turn a motor,  but it will definitely create useful light from LED's or even fluorescents.

two AA's may light some white LED's brightly for a long period of time, but a flash circuit using one AA can convert that current and light hundreds of the same LED's brightly for a week.

the benefit of the JT comes in when you take into account it can be made to oscillate from under 1.5V input, as opposed to the two AA's failing to light the LED's as they fall below a combined 2v or so.

I agree with everything you have posted except that, a JT circuit will run a motor.  I can run a Bedini motor from a single AA and a JT circuit.  I do not believe I was the first to do so.

I have nothing against using 2 AA's but, consider this, I have used C and D batteries one at a time because, as you have said, more mA's available which converts to longevity.  I suggest using the larger sized 1.5's as opposed to using 2 AA's.

Just my 2 cents.

Bill

[Magneticitist]

oh i realize running a motor is possible from the JT, even a conventional DC motor, but in the end i feel more credit would be due to the actual motor construction rather than the JT, being that the motor is obviously able to run from such a low current. similar motors have also been proven to be able to operate from 1mA earth batteries or even wireless, which i find amazing in itself, so the JT being the input in that case would hardly steal the focus in my opinion. i have seen some of your vids and its safe to say you are a JT guru lol, u already know of the JT's potential.

and i agree about the larger 1.5's.. i had the best results from using a D cell, probably because of its obvious higher capacitance.

to me the beauty of the JT is that since LED's can light from transient, one can potentially create the circuit to run from microamps and the efficiency can far outshine that of a regular input source.