Joule Thief

[jadaro2600]

This lower amp draw from a loaded transformer is what caused the 'vampire devices' hysteria back in the energy star craze ...those wall transformers / block devices that we use to charge cell phones, and what not actually use electricity even though they're not really in use.


@all having success,
Some of you that are having success with your toroid winding - have you though about creating a PDF or some versioned document for instructions - this would make it easier for Pirate to move it to the diagrams thread when the time comes.

[innovation_station]

i have decided to do a little math  regarding the coil im showing ...

i will use 2vdc-.5vdc as my supply ... 

now each out put as the wire is rated can handle 600v@10amp  my diodes can handle 800v @3amp

so out put of my coil could be 800v 1.5 amp ... no worries ...  my wire canhandleit ascan my diodes ...  now

imagine 30 outputs of 800vdc @1.5 amp ... and that is only 1 side ... 

so now you say how the hell you gonna get 1.5 amp @ 800v ..... x 30

hummmm 

i bet you ALL ALREADY KNOW 

tune it to the voltage you desire ...   and give her some GRUNT     lol

i will increace the driveing amprage..  till i get the desired out put amprage ..... 

ist!

YOU KNOW IT!!

BTW IF IT IS WRONG ...  FIX IT!!!!!         IM A KID WHO DROPED OUT OF SCHOOL DONT EXPECT PERFECTION ....   WITH A VERRY LIMITED KNOWALAGE OF ELECTRONICS

were lucky i made it this far ...   

[TheNOP]

And the loss is the amps draw? so, the amps draw is greater without the load?

hmm.

thanks. There is no way in the world I would have been able to put that together to mean this.

jeanna

a secondary coil(s) does not "draw" amps upon the primary.
a transformer secondary, by virtue of induction, only use the current that is already circulating in the primary.

[jadaro2600]

I've posed this question once before; I will simply rephrase it now due to the fact that it's been a broken thought across many posts.

Shouldn't we worry about what type of voltage is bouncing back to the negative end of the battery?  Couldn't this effect the battery?

I understand that these device are using transient surges from collapsing magnetic fields, and that there are pickup coils which are harvesting these voltages - in most circumstances - however, doesn't it stand to reason that there may be high voltages returning to both the transistor as well as the to the battery, and that these components and the coils connected to the collector and base mad be getting voltage flux from the pickup coil as well?

There are options, zeners, etc, however, the ideal setup is one that minimally effects the transistor and thus the battery as well.  And we could come up with some elaborate system for that, but I bet it would turn out a lot like the ballast in a florescent light fixture.

Of course, the quest for over unity would have us all looking at a completely resonant circuit, where all we need is to start the process of resonance and let the device do the rest, however, that's more or less what the toroidal power unit is all about.

I still wonder if the fact that this is a toroid has something do do with it's effects - which is why I asked about the ferrite rod, and posted that picture of the split lock-washer.  I'm thinking about sacrificing one of my toroids to create a split in it just to see if this effects operation as I think it may - what gets me started in on the weirdness of all of this is, that the majority of electromagnetic fields ( flux lines and thus current ) are at the center of any coil and so out toroids must be conducting, if at least a little, on their inner material, as well as at their center of gravity.

[TheNOP]

Shouldn't we worry about what type of voltage is bouncing back to the negative end of the battery?  Couldn't this effect the battery?

adding a cap in parallel with the battery should help eliminate the transient surge going back the the battery.

base mad be getting voltage flux from the pickup coil as well?

yes, same surge goes to the base.
see my suggestion of turns ratio for the jt coils.

a zener diode will probably return us to what IST sayed.
"the whole world only use half of it"
the proper way to use a zener diode is to sink the over voltage through a resistor, sink = loss energy to me.
but currents always seek the less resistive path, who know what the result would be.
it need to be tested.

a zener can be use unconventionally to damp the voltage but it is no better than a resistor in that case.

we must thrive to keep the triggering voltage of the base as low as possible,.
so a ~.7 volts or lower can reach the base at all time.
while protecting it and not imper the current flow between the collector and emitter.

a separate low voltage triggering circuit, blocking/non blocking or crystal oscillator , can possibly be used too.
that circuit can be protected by diodes without affecting the jt transistor/coils operation.


b.t.w.
ballast in a fluorescent, unless it is electronic(screw in cfl), are resistive transformers.
meaning the amps are limited only by resistance, 7.5kv at ~80 watts.
at higher frequency, we don't need 80 watts...
look like it still cost less to waist energy to resistance then using the right way to limit amps.
unless they keep for future, so they can ask more $$$ for that "innovation".

but, with the price of copper, it is slowly changing i think.
i had to change my furnace ignition transformer, the replacement part is an electronic one.