Joule Thief

[Mk1]

http://www.scribd.com/doc/6907836/thetpu

http://www.scribd.com/doc/6907813/steven-mark?ref=Sex%C5%9Ehop.Com

http://www.scribd.com/doc/95105/The-Hendershot-Motor-Mystery

http://www.scribd.com/doc/6905208/endgame

[xee2]

@ jadaro2600

I built another toroid of copper, as I said earlier and I can't get it to work at all.

If it worked before it should work now. Have you tried reversing the connections on one of the transformer wires? As you pointed out, the currents needs to be flowing in opposite directions in the coils. It is not easy to understand which way the currents are flowing so reversing one set of leads is worth a test.

EDIT: Also, with the diode added, you will need a battery voltage of about 1.5 volts to get the transistor to turn on.

[jeanna]

@jadaro,
In this drawing there is no resistor at the base of the transistor. In my understanding this resistor is necessary to control the number of times the transistor turns on and off.

@General Jim and Ist,

I am glad to see an understanding arising about the 2 different interests in the use of a joule thief.

Now that the fuji ckt is sequestered and doing fine there, we can see we really have basically 2 plans among us.

@all,
Please let me say here that I think IMHO that everyone should be pursuing the direction they find most delightful.

That said...

I am for doing something with low amps, and doing something with that once achieved.  I have no real interest in getting a big amp draw.

I am interested in high frequency low amps and exploring those possibilities.

more later...

jeanna

[jadaro2600]

@ jadaro2600

If it worked before it should work now. Have you tried reversing the connections on one of the transformer wires? As you pointed out, the currents needs to be flowing in opposite directions in the coils. It is not easy to understand which way the currents are flowing so reversing one set of leads is worth a test.

EDIT: Also, with the diode added, you will need a battery voltage of about 1.5 volts to get the transistor to turn on.

I tried this - apparently I need a finer gage wire in the primary - there seems to be only a weak mag field.  THe issue is, it's a new coil, so the design is different.  THe other toroid works, it's just a weak effect as well.

@jeanna,
That circuit posted works - just not with my most recent torroid.  It may be a broken circuit.  Nothing seems to be going well today with this.

@all,

Can any of you recommend a transistor with a very low activation voltage?

Wasn't someone thinking of replacing the transistor with a diode?  ..maybe a Schottky or a Zener? or some combination?

[innovation_station]

OMG MK1


WE ARE ALL IN THIS TOGATHER .....   


i bet you had a previous nik ....

ist