Joule Thief 101

[tinman]

 author=MileHigh link=topic=8341.msg475158#msg475158 date=1456117360]
Brad:






MileHigh

You are really hung up on the EMJ question and accusing me of it being incomplete which of course is ridiculous again because I never even said what the question was.

Post 389 Quote MH:  I called his bluff and asked him how a circuit worked that consisted of only two components, a voltage source and a coil, and was unable to answer the question after he was talking about coils for months.


Brad

[tinman]

Not a chance.  It's more like you were too immature to just tell me which posting and likewise you are too immature to admit that it's just a paste from somewhere else.  It's just like when you are challenged about Joule Thief operating voltages and your fake response is to say "Everybody is only interested in Joule Thieves operating at lower voltages."  It's a pattern.  It's Brad's continuous BS on the fly to make it look like you are never wrong - which is extremely immature.

Face it MH--you got smoked.
I did what you were no expecting me to be able to do--something you yourself couldnt explain.
My info and teachings come from all sorts of source MH--not just the book's.
Now we see you trying to save face,and say i just did a copy and paste job lol.
Trying to divert your losses by way if trying to discredit the experimenter. We all know you will not find any papers or links that show i did that,and all the evidence will indeed point toward my learnings from real EE guy's here and at OUR.

You see MH,i post the truth,and you post garbage. I have freely admited that i had no idea as to how the cool joule circuit was running without that inductive coupling between L1 and L2. But after some great debate on the OUR thread nearly 3 years ago,Vortex1 came up with the answer,and from that answer i have learned. Along with additional information found in many places,we can put all this knowledge together,and get circuits to work based around that information--we learn MH
You were not even going to give it a go--and i did-and i got it right-->much to your shock.
Always expect the unexpected MH,as you have seen here-it can bite you on the ass.

You made the mistake MH, that i could not possibly learn that fast,and now you know different. Now you go to plan B,because you do not like to be out done by some amateur benchtop experimenter. Now your next angle is to try and discredit the experimenter,as loosing to him is not on your acceptable list. Your angle here on this thread alone,has become quite evident.

Thank's-but no thank's MH


Brad

[Magluvin]

Here is a circuit from Lasersaber that seems to use the 'capacitance' between the 2 windings to complete the base trigger circuit. lrC anyone?

Mags

[MileHigh]

Brad:

My objective on here was to discuss how a Joule Thief normally operates because a lot of incorrect information was being given.  That has been successfully done.  During the battle over that subject you talked a lot of whackadoo nonsense at times.  You said all of the online references were wrong.  You even were parroting the transistor junction capacitance stuff over into the discussion about the Joule Thief in normal operating mode because at first you were failing to distinguish between the two modes.  The use of language in that paragraph is totally different from the style and cadence of how you normally compose text.

In post #157 you said this:

Set up a bifilar coil with a steel laminated core,where the core is two separate halves -1 half will see the flow of charge into the magnetic center,and the other half will see the flow of charge out from the magnetic center. Set up a simple self oscillating circuit,and run the LED off the two core halves,where you two core halves act like capacitor plates,and are charged every pulse. this way you can bring your frequency up to a resonant state,where the amplitude is at maximum,and power draw at a minimum.

That's a typical "Brad from Planet Bizarro" posting.  So you can't just go from your typical puzzling and awkward technical prose to a decent discussion of transistor modeling at low voltages with internal capacitance coupling like some magical Mr. Hyde to Dr. Jekyll transformation.

That discussion from somewhere else that you posted sounded quite credible but you never "wrapped it up and made it whole" and discussed a full oscillation cycle from start to end.  You never made reference to how the operating frequency was determined.  So my instincts are telling me the parroting got you close, but not quite all the way there.

Your post #430 is another one of those "shaking my head" moments and that would apply equally to all of the readers of the thread also.  Just another jaw-dropping moment.

Finally, Magluvin posted another Joule Thief schematic that was taken from a posted pdf from the early days in this very thread and I am reposting it here.  What a shocker eh?  They list the battery voltage as having a range of 0.3 volts to 1.5 volts.  It makes all of your whining and pleading that "Everybody wants to use a Joule Thief at low voltages only!" to justify your bullshit to try to make yourself infallible look laughable.

Your low-voltage discussion that came from who knows where might be credible, I am not sure.  I wasn't here for that, I just wanted to go over how a Joule Thief normally operates.  And what a slog that was with all of the battling and baiting and switching, most of it simply ridiculous stuff to keep the imaginary halo over your head.  In the end you stopped challenging me and you agree with the basic pulse circuit operation with the positive-feedback regenerative switching that makes the thing oscillate at an operating frequency, not a resonant frequency.

MileHigh

[MileHigh]

Here is a circuit from Lasersaber that seems to use the 'capacitance' between the 2 windings to complete the base trigger circuit. lrC anyone?

Mags

No kidding, it looks like a circuit that may have been purpose-designed-and-built to use "capacitance."

You can claim that cars have four wheels and I can "get you" by posting pictures of cars that have been purpose-designed-and-built with three wheels.