Joule Thief

[jeanna]

jeanna when you say pickup are you referring to the 3rd coil? or are you using a 2 coil system here?

I am sorry to confuse you and probably many others.

The meaning of secondary and pick up is the same.

I have a bifilar primary which basically means a center-tapped primary, but can be made with 2 wires of different colors connected in the center. (and so some people call it 2 wires or 2 primary coils. I think it is one.)

and also

a secondary which is called a pickup. (It is an easier word for me when I am describing the one with a second tier  calling it the second tier secondary is a bit too much.)

I hope this explains what you were asking  If not, please ask again.

jeanna

[jeanna]

jeanna i dont know how accurate this thing is and i dont know what all this means yet but i found a wicked setting. check this and make sure you have the inductor and cap showing on the chart.
2.5v  0ohm  750uf  75uh

Right,
but you will always have some resistance.

It is really important to have at least 1.6ohm or 2ohm.

I made one with 3 ohm and changed the cap to 0.075uF (75nF on the slider) and got a similar curve.

About the accuracy, it is a simple equation so not real world and also it is a series circuit. and gadget uses a resistor in series with an inductor both in parallel with a cap. that makes it different.

But I think the joule thief itself is more like the simulator than the base tank.

confused yet? sorry.

thank you,

jeanna

[resonanceman]

Put a 1 ohm resistor in series with your battery then read across it

@all . you do not need to put your amp meter in series with a circuit . Put a one ohm resistor in your circuit and then you can read across it for your current draw . same goes for the output circuit . put a one ohm resistor in series with your Load and you can get an idea of the power  out .
BASE Emmiter VOLTAGE is 7 volts max on 2n3055
the input voltage is collector emmiter Is maximum 60 volts
so 60 volts is the max  input .
Minium is .7 volts . i am running one now at 0.735 volts

ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
NPN 2N3055
PNP MJ2955
VCBO Collector-Base Voltage (IE = 0) 100 V
VCER Collector-Emitter Voltage (RBE £  100W) 70 V
VCEO Collector-Emitter Voltage (IB = 0) 60 V
VEBO Emitter-Base Voltage (IC = 0) 7 V
IC Collector Current 15 A
IB Base Current 7 A
Ptot Total Dissipation at Tc £ 25 oC 115 W
Tstg Storage Temperature -65 to 200 oC
Tj Max. Operating Junction Temperature 200 oC
For PNP types voltage and current values are negative.
1/4

Just playing with this mobius rod Jt . its been running over a week contiunious.. not to broght right now but still producing light . 5 20kmcds one 100kmcd and one tophat115kmcds . i use a 100 k resistor on the base and a 104 cap to get this sucker oscillation . the mobius has about*edit* 55 knots and then i wound a single 25 turns over that on an old radio ferite barium rod and run this as a normal jt
Edit . i was wrong the volts can go as low as .5 . i shorted the battery just to see and its .598 and still lights . the last pictur is a recharged 1.3 volts full power . i am starting the test over at 9 days of running
Gadget

Thanks  Gadget


Can  you  tell me a little more about   this mobius JT?

As I  understand   what  a mobius is  ......  the name implys  that it  is either connected to itself ........or feeds back to itself



gary

[gadgetmall]

Thanks  Gadget


Can  you  tell me a little more about   this mobius JT?

As I  understand   what  a mobius is  ......  the name implys  that it  is either connected to itself ........or feeds back to itself



gary

I built this one and then i wrapped a straight coil over that and made a Jt . I don't know what it does exactly . i'm experimenting  with it . Looks like it runs a long time  :  I'll try the mobius toroid next time  :heres more info  http://jnaudin.free.fr/html/tripole.htm

[Mk1]

@gadget and all

I remember posting this for the group , my reason for doing it was to give idea on coil design , some basic stuff is still not understood by most , i will try to illustrate that point .

First rule , to positive side of the coil is north and the negative south , basic rule , the north is on the side of the inrush of current .

Like in a magnet there are 2 poles , and are acting in the same manner , north is a intake and the south the out take .

Pulled to trough the north pushed out the south .

Those are basic , but reversing the winding direction will also reverse the pole .

A basic coil is bi polar , north and south, in the case of the mobius it has 3 poles , north south north , the winding direction changed in the middle creating a strong south pole on the middle of 2 north pole .

Everyone played with magnets , you all know the magic is when you oppose the 2 magnet field , you need to start playing with the opposition and attraction effect .



Mark