Joule Thief

[nealc99]

FIRE SALE!

Found some "super cheap" 1/2" N45 Neo magnets at a price you might be interested in - $0.95 each!  Might be perfect for bedini motor.

http://www.magnet4sale.com/Sphere-Neodymium-Magnets-Dia-0.5-N42-NdFeB-Rare-Earth-Magnets.html

[SkyWatcher123]

Hi Folks, i was wondering if anyone can help me solve this heat issue with my joule thief circuit. at 6volts i see no problems with heat, however at 12v or greater, the transistor heats up when powering a fluoro bulb off the secondary, however it barely heats up when charging a 12v battery off the primaries flyback with diode. My guess is that when powering fluoro off secondary, that some of the collapse is induced into feedback winding of the bifilar and creating an issue at the base of transistor. Where as when charging a separate 12v battery off primary flyback diode, almost all the collapse is used up in charging battery leaving little to induce in the feedback winding. Hopefully some can help me understand what needs to be done with the circuit to prevent this heating. Thanks.
peace love light
Tyson

[sparks]

  Did it again.  Left the lights on in my infernal combustion machine.  The ridiculous machine for some reason needs to compress the air fuel mixture before the fuel will combust.  Why engineers havent been able to figure out how to add fuel to the cylinders past top dead center and combust same without having to resort to wasteful fuel air compression is beyond me.  The steam engine didnt have to compress the steam it just valved it into the cylinder at the proper time and the cylinder expanded.  Some idiot says gosh I can bypass the boiler and use the cylinder as the heater upper directly. Start that there fire right inside the piston.  After millions if not billions of hours of engineering the automotive industry insists on producing the same most inefficient engine ever created.  The wasted fuel is incredible.  On the scale of energy efficiency star system this piece of shit wouldnt even rate a moon.  When you have to use 3horsepower just to prepare for the chemical to kinetic conversion event something is wrong.  Just the three horsepower in a properly designed vehicle will suffice.  I dont need 150 horespower to travel 10miles in 30minutes.  I need an electric go cart with a rain tight enclosure and some windshield wipers.  Headlights are useless just a pair of nightvision goggles and I'm good to go.  All headlights do is blind other motorists so they have to use their headlights that blind other motorists.  A chain reaction of rendering vehicle operators blinded making it necessary to light the roadways and waste more energy.
When someone has to tell you you have a headlight out it tells me they arent really needed.  Sylvania needs em I dont.  My eyes dialate when it is dark I dont know about yours.
   Anyway as I have posted before if you have a functioning jule thief I would get on down to the patent office and patent it as a device for emergency starting of the infernal combustion engine.  A big jt should be able to tap a battery on down to 1/2 a volt or so.  Since the starter motor needs 9volts  to get through the compression resistance of the engine and about 1000  surge amps the Jt should be able to take a bunch of juice from a "dead" battery and boost it up to charge a small carbon lithium battery to give the surge needed to crank the engine.  The carbon lithium could be charged up to 300volts which would drop quickly to 9volts and give the 1000amp surge and the 300 cranking amps needed to get the oil burner ignited.  Most home furnaces just need a 1/6hp motor to blow air and pump oil and a highvoltage transformer to get them going but not the infernal combustion engine.  The use of a highvoltage battery allows for a great reduction in weight.  Why 12volts dc distribution in a car anyway.  A highvoltage starter motor would require minimal amps especially if it spun up a flywheel and at the desired rpm engaged the clutch instead of brute force battery versus compression.  No heavy cables and contacts.  Wire diameters reduced by 10fold.  No sulphuric acid to handle.  Probably has something to do with highvoltage and oil all over the place associated with the piece of crap engine that has a tendency to waste oil in every conceivable manner possible short of pouring it straight into the oceans.  Oh they figured that one out too.

[jadaro2600]

Hi Folks, i was wondering if anyone can help me solve this heat issue with my joule thief circuit. at 6volts i see no problems with heat, however at 12v or greater, the transistor heats up when powering a fluoro bulb off the secondary, however it barely heats up when charging a 12v battery off the primaries flyback with diode. My guess is that when powering fluoro off secondary, that some of the collapse is induced into feedback winding of the bifilar and creating an issue at the base of transistor. Where as when charging a separate 12v battery off primary flyback diode, almost all the collapse is used up in charging battery leaving little to induce in the feedback winding. Hopefully some can help me understand what needs to be done with the circuit to prevent this heating. Thanks.
peace love light
Tyson

You'll need to determine what the resistance at the base is and scale this properly with increased source voltage.

Know your transistors: ..most of them in the to-92 plastics only require 1 volt to fully cut on, in the to-220, usually 2.4 volts.

The 2n3904 only needs 2k resistance at base, on a 1.4v source to 'cut on'.  It uses about 1mA.

If I were to increase the source voltage, then I would need to increase the base resistance likewise.

[dasimpson]

found my problem dead tranisister opps