Joule Thief

[jeanna]

@xee2,

So a decision needs to be made about where to take the energy from the collapsing magnetic field out of the circuit. It should either be at collector or at the pickup coil. Using both will split the energy between the two.

This is where "The Man" connected a wire and ran a motor, or the light bulb in the picture, or any other light bulb, according to him.

EDIT ADD
The problem with using the collector is that it is now DC again, and you are using amps.
If you use the secondary/pickup, you are still in AC and in so doing, you are not using amps, you are still able to use just volts and frequency.

jeanna

[xee2]

@ jeanna

EDIT ADD
The problem with using the collector is that it is now DC again, and you are using amps.
If you use the secondary/pickup, you are still in AC and in so doing, you are not using amps, you are still able to use just volts and frequency.

Good point. It is very hard to get AC off the collector - emitter path without shorting out the transistor. But it can be done using a couple diodes and a transformer.

EDIT: I was just looking at this recently, and I think it turns out that twice as much power is available when using a pickup coil as when using the collector-emitter path.

[amigo]

On the subject of transistor C-E and AC, if you draw the transistor into oscillations like Dr.Stiffler does in his circuit, then the resulting output siphoned via a capacitor and an air coil, in resonance of the base oscillator, is always AC, as DC can not traverse across the cap.

Albeit, you are getting wide band harmonious high frequency oscillations, so how you step that down to your needs is your choice. But, if you have followed Dr.Stiffler's developments, AV Plug is used to convert that output to DC and feed it to LEDs, motors, neons, etc.

Regarding Tesla, I think it is important to note that he MADE his own motors and light bulbs that were specifically created and tuned to work with his electrical sources. Just assuming that you can connect a today's incandescent bulb or a motor is erroneous thinking.

About Tesla's patent #583,953 he says on page 1 line 47:

"...or provide independent condensers, and employ means for charging said condensers in multiple and discharging them in series through the primary of the transformer"

Here he is charging capacitors in parallel and discharging in series to gain higher voltages. This can be achieved by using a specific circuit called Marx Generator (which was invented later), that creates high voltage DC pulses:

http://en.wikipedia.org/wiki/Marx_generator

And here is a write up on how to build one (I like this one, very fancy):

http://members.tm.net/lapointe/marxmain.html

Lastly, I do not believe you will see much with 250V as that is probably not even enough to crack the air barrier in a spark gap of one millimeter size.

[altrez]

@ALL

Here is a pic of my fuji circuit running 140 LEDS! I have worked on it off and on for awhile and I just got some LED Christmas lights in to test with

Take Care,

-Altrez

[jadaro2600]

I don't know what I was thinking when I made that comment about continuous AC...I'm not in my right mind.

So finding the right frequency is the point.  I'm assuming.

There is waste coming out of the emitter, but we have to have it in order to complete the circuit.  SO  it's not really wasted but for a short time.

I my previous post a few pages back, I mentioned the duty cycle.  I'm thinking that a low duty cycle will mean less power being consumed.

I think i'll try to take some more measurements off one of my circuit that uses a capacitor instead of a resistor.  As I understand, most of you put the resistor at the base, that isn't how I've done things, it does make sens to put the voltages up from before the drop, but I've gotten the idea in my head that it only takes a little bit of inrush current in the collector coil to block that in the base coil.

I think at one point, I was measuring 1ma of current going to the base, this is a paltry amount and easily upset by induction, and with that same low current, the 2n222 turn itself on full throttle.  This is why I put the capacitor up front, removed the resistor at the base.  It only takes a little bit to turn the transistor on, having a continuous current pass through here can be replace with reaction from the other coils.

I'll just have to get this whole thing working with a secondary coil to make it relevant.

The Marx generator, Greinacher / Villard / Cockroft-Walton circuits are all basically the same...they're component intensive, and In order to perform their best, I think some of the require clean AC.

@jeanna,
I did read the patent, it's an oldy but goody.  He's specifically vague.

He mentions using both AC and pulsed DC for the effects he mentioned.  But these diagrams in the patent are a complete  mystery to me..the seems very general.

@all,

Letting things spark is a good way to create X-rays.  Rather than just creating tazers, maybe we should just try to put a load on it?