Joule Thief

[gadgetmall]

Gadget:

I have room for about 600 winds on my "W" toroid of 28 ga. Newbie wire.  Not much more than that though and that is with very close and careful winds with no overlaps and no gaps.  It took me 3 evenings of about 3.5 hours per evening just to wind my 330 turns.  I don't know if I have the patience to wind that many, plus, since I have double stacked toroids, it takes a lot more wire per turn.

I agree with your coating the toroids suggestion.  Hey, what about that stuff that you can dip tool handles into to make plastic handle covers?  Do you know the stuff I mean?  It is mostly made in red but you dip tools into it to coat them...would that be too thick after dipping and block the inductance?  The only reason I thought of it is that it would be simple to get a nice, smooth uniform coating by dipping.  It might be too thick though.  What do you think?

Bill  ***EDIT***

Here is the link:  http://www.plastidip.com/home_solutions/Plasti_Dip

I see it is available in many colors now.

***EDIT***

I see they have it in spray form too and it is available at Lowe's, Ace Hardware and
Harbor Freight among other places.

Hi pirate . I didnt relize it came so thin  ok . BUT I sugess you not dip iot first . you will not be able to slid the wire and it will take forever to wind it . I would mine with blacktape on the toroid . Here is the best way . Find some Clear coat Spray can coat the toroid ,let it dry and spray it again  ,dry . Then you will haev aslick surface to slied the wires close todether without any problem . After you wind it then spray it several more times letting the clear coat soak in the windings and dry it near a heater  and do it a feew times and them after it frys completly cover it with black tape and that baby is sealed . I sis it todsy and finished mine . It is surebright and has been running all day long on full power on a 45 watt bright white Cfl . I can obnly imagin what a 20 watter will be . This one is almost as bright as house current . I am very happy with it . And guess what it still screaches and screams and sings loud and my saughter can hera it in another room away . I can hear it if i put my ear to the toroid . Its cool ! and dosnt draw that much varies from 28 to 40 ma , It can run a long time on a c battery . I want totry a darlingtom on the next one and see what haoppent doubling the primary current and voltage  )

@Jeanna paint does not affect oerating any . when i ordered i order two more grey coated ones 4 inch w cors and the are super strong . The Coating is for High voltage protection . On the one that was eating up magnet wire i just wrapped it with blacktape . Well that was a mistake as it is hard to wind as the wire wont slip over so it takes longer  BUT after 4 hours and 600 turns and then painted with clear coat My Once Naked Toroid with the same exact wire i unwound it as bright as ever . It is so bright you cannot look at it directly  like one in the 100 volt socket , but this is a 100 watt bulb also so its really bright and needs a shade on it . . So paint your bare toroid and use regular wire is ok  and no performance degreidation and no blue  Glowing Torroid either . . I alleast have 3000 4000 thousand volts to fire a 45 watt bulb to near full bright using 600 turns #26 green magnet wire .

[xee2]

@ electricme

@ xee2
The resistor on the ignition coil is to drop the voltage to the primary side of the coil "after" the engine starts.
The ignition switch, by passes the resistor while the engine is cranking so the ignition coil gets full voltage to work with.

jim

I thought it was to reduce radio interference? The resistor is always connected inside of the coil, there is no way to bypass it. I have always wondered about why they would put a resistor in the coil. I just do not know enough about cars to know for sure. Thanks for your feedback.

[nievesoliveras]

@all

Merry christmass and happy new year!

I found the key to close the loop on the joule thief circuit.
You know that the coil has a part that is called feedback.
I added to it a diode and the circuit was coded into the circuit simulator.

It shows that is self running.
The screen capture is included.
If anybody has a circuit simulator and want the code to test if this is true I will post it here for all to use it.

You know, maybe I die and the circuit is thrown away because is not understood.

Jesus

[Pirate88179]

@ Jesus:

That is great!  I hope we can build it to prove it works.
Merry Christmas and Happy new Year to you too.

@ Gadget:

I happen to have a Darlington i was saving for just such an occasion.  Should I try that on my next large toroid wind?

Bill

[kooler]

xee2 the resistor type coils were used on up to 1974 on chevy and fords... and dodge used them up to 1991 model the resistor in the old ign coil was to block the very large spike that came from the voltage regulator that was mounted outside of the alternator
if you tore apart one of those old regulators you would see why...
two normally open contacts and one normally close ...
two coils in the volt reg 14-12 awgs coils in it
one coil is 30 awg about 800 feet of it

i forgot to mention
the resistor spark plugs and plug wires were redesigned for the radio problems