Joule Thief

[DimaWari]

@Flux4Energizer

I think he use zener diode to helps create a sawtooth wave form...
Maybe u can produce more collapsing magnetic flux line because it contains even and odd harmonics.. wont they?

http://talkingelectronics.com/projects/XenonFlasher/XenonFlasher.html

[Flux4Energizer]

@DimaWari
I really don't know. Would like to see his circuit so we can take a look.

@resonanceman
Could you post your circuit?

[Artic_Knight]

koolers circuit that runs off of 0.16mah was that posted and i missed it? i would assume its very similiar to his other posted backwards joule?  if anyone has a moment i would love to see how he got the draw reduced so low.

thanks!

[resonanceman]

Hi @resonanceman!

Are you going to post your circuit?

Jesus

Jesus

I will try to draw up a schematic  as soon as I have time

gary

[resonanceman]

@resonanceman (Gary),

Oke, i see what you mean now.
Well i can be very brief in this case; the circuit you discribe won't work!!!
I understand where you are going with this but you oversee one little problem; as soon as you will use the red led as a
voltage protection for your 2.7 Volt supercap you will distroy your supercap!!!
You made a little miscalculation here; let me explain: the red led starts conducting when a voltage of 2 volts (or so) is reached.
This means you have a zero volt negative and a 2 volt positive. When you hook up a led directly on 12 Volt you will burn out the led right???
Well this isn't really true -> the led will burn out when +12V and -0V is used, BUT when +12 Volt is used as the positive and +10 Volt as a negative
the led will glow very nice and need (i think you get where i´m going at!?!).

Now in your circuit you'll have the drive battery (i think 1.2 up to 1.5 Volt) and the charge ultra cap (2.7 Volt as you said).
So in the worsed case your led will start conducting at 1.5 + 2.0 = 3.5 Volt.
This is why i say it will not work because it's not reliable.
It only protects your ultra cap if your drive battery is at 0.6 up to 0.7 volts!!!
There are still more reasons why this won't work but i will stop here because this is the main issue.

I hope you agree, but if not i would like to hear your thoughts about it.

P.S.
I don't use a zener diode in my JT circuit.
The circuit shown is a picprogrammer circuit JDM style!!!

Regards,

Flux 4 Energizer

Flux4Energizer

We will see it it works or not.

Your logic only applies if   your assumptions  of  what I am doing and how I am doing it are correct.

In preliminary tests  my red LED starts conducting  at 1.75V ......        ( Edit  this should be 1.705 V )

so far my U cap  has not exploded. 


gary