Joule Thief

[TheNOP]

@jeanna
amplitude is the difference between the lowest value and the highest value of what you are measuring.
amperes is a measure of the amount of electric charge passing a point per unit time.

ex: 1 A = 1 coulomb / 1 second.


the peek value of a signal wave/pulse alone is not enough to tell you the energy quantity you have.
you can think of the voltage as the pressure in a hose and the current as water flow.

in the jt transfo case, the spikes come from the pressure.

ex: you would not want to put your hand in front of a 3600 PSI pressure washer.
suprisingly, the quantity of water(current) flowing out is not that big.
but look the work those machine can do at that pressure.

W = I * V
I  is the current
V is the voltage
W is the power in watt

[jeanna]

@mk1,
I never used any diode in the joule thief except when I used the bridge for checking the output voltage.
Is this what you mean?


or do you use a diode to keep things going in DC?
(I can't imagine why you would switch to dc after achieving ac, but I don't understand some of these points at all.)

thank you,

jeanna

[innovation_station]

the reason i switch it to dc...   is because the AC FREQ  is tooooooo HIGH ... 

rectify  it and dump in a cap bleed off cap to charge batteries ....  or  WHATEVER U WANT ....

this solves the high freq ac thing ....  to a point ... 

if we used iron...  i bet we can get 60 hz ac out of it  lol

almost done the MK HV!   quite a few turns to it ... 

ist

[TheNOP]

I never used any diode in the joule thief except when I used the bridge for checking the output voltage.
Is this what you mean?
jeanna

yes
the voltage you can get can go higher then the reverse voltage limit of the diode you might use.
if thisoccure they will blow up.

[Mk1]

@jeanna

The diode are mostly needed for running other electronics most work on dc, but in the case of led it doesn't really mater ,
i also use them to check voltage and comparing to ac , it give ma a idea of the wave form , since i don't have a scope.

I guess so far i am just finding ways to get juice out , but not finding uses for it.

So what are your goals .

Mark