Joule Thief 101

[MileHigh]

Brad:

Let me guess--you are full bottles on it,even though you probably have never looked into it's operation?-->do tell.

The real problem is that it's a circuit that you stumbled upon and you yourself have never looked into its operation beyond merely observing it.

I looked into something similar 30 years ago.  Stop BSing yourself with two-word "explanations" for the way a circuit works when in reality your "explanation" is nothing more than a property of a transistor.

For example:  You don't have the slightest clue what actually determines the frequency of your "Cool Joule" circuit.

MileHigh

[MileHigh]

Brad:

It would seem to me,it's more of an argument as to the JT is suppose to do,and what we want it to do. You want it to be used at voltages where you have a standard blocking oscillator operation,were as!i believe! the rest of us wish to use it to drain nearly dead batteries all the way down.  This is what the JT is used for mostly MH,so why should we be looking at how it operates at higher voltage supplies?.

Now you are playing straw man and trying to put words in my mouth.  It was an argument about how it operates and two weeks ago the statements about how it operates were nonsensical bunk.  As a blocking oscillator it will still manage to pull the battery voltage low.  Below a certain threshold something different happens.  I saw that in Joule Thief clips years ago.

Stop the baiting and the switching and stand up for what you say with conviction and backbone, even if you are wrong.  Go ahead and do what will probably be a more complex analysis of a Joule Thief when the normal mode of operation breaks down at very low voltages if you want to do that.

MileHigh

[Pirate88179]

https://www.youtube.com/watch?v=Co4WsKOcJk0

200 leds lit from a single "dead" AA battery.  To me, this is what the JT circuit is for.  I have also done 300 and then 400 but, they are not as bright as these 200 leds.  The battery was well below 1 volt at this time.  I am still impressed by this...call me simple but, it is still pretty cool.

Bill

[tinman]

Brad:

Now you are playing straw man and trying to put words in my mouth.  It was an argument about how it operates and two weeks ago the statements about how it operates were nonsensical bunk.  As a blocking oscillator it will still manage to pull the battery voltage low.  Below a certain threshold something different happens.  I saw that in Joule Thief clips years ago.

Stop the baiting and the switching and stand up for what you say with conviction and backbone, even if you are wrong.  Go ahead and do what will probably be a more complex analysis of a Joule Thief when the normal mode of operation breaks down at very low voltages if you want to do that.

MileHigh

Already done that.
The only reason you are not happy with that,is because it go;s against what you believe.

So--how about that little competition MH ?. You up for it ?.
It's quite simple really MH. All you have to do is use your understanding of how thing's work,and i will use mine


Brad

[tinman]

https://www.youtube.com/watch?v=Co4WsKOcJk0

200 leds lit from a single "dead" AA battery.  To me, this is what the JT circuit is for.  I have also done 300 and then 400 but, they are not as bright as these 200 leds.  The battery was well below 1 volt at this time.  I am still impressed by this...call me simple but, it is still pretty cool.

Bill

Great job Bill.
It is good to see some one that knows what a JT was designed to do.


Brad