Second Stage Joule Thief Circuits

[friendryan]

I have read the first 25 pages of this post.....then I skipped around because I haven't seen anyone replicate the simple circuit this whole thread started from.....Wasn't it the OU prize? I saw some serious confidence about how simple it is, that it will be won so easily, and now I see that this thing is trying to run with diff parts, diff setup, and a whole lot of tangents away from it...so could someone save me the rest of the reading and let me know if anyone replicated this circuit and did the OU prize get won?...This has been going on for months and for such a simple OU design it sure seems like the rest of the other threads. Did anyone ever truly measure input over time vs out put over time...thanks......

[mscoffman]

@all
a 60 watt is a bit more of a pain to light due to it's low resistance to light up .. once i get the ma's draw down and it is safer, i will post a good schematic.. but right now there r some safety issues.. or i just been having a bad couple of days..robbie

@Robbie;

You have an excellent point. Incandescent lamps have what is
called :"negative resistance". They start out at very low ohms
and only increase in resistance once they heat up. So they
have a high starting current...like AC motors. They also tend
to burnout during this time.

This is an unusual feature in electronics components
and can be used to help stabilise a system that has
voltage variations...the problem is it's hard to know
what their impedance is at any one time so they
are bad for determining exact wattage dissipation.
As well as their tendency to emit heat and IR rather
than light. So I like leds and CLF's, but they do form
an historical load experience base.

:S:MarkSCoffman

[mscoffman]

I have read the first 25 pages of this post.....then I skipped around because I haven't seen anyone replicate the simple circuit this whole thread started from.....

I agree with you, the fact is that experimenters don't often do very
good advertising...Every once in a while they should put together
a page of text and links pointing to their very best recent solution,
and statement in good English stating about what they think they
have accomplished, without this,  development become almost like
a secret, they don't want to brag about the results and they get
understated, and newby's are cut out. I guess the solution is to
continue to study the thread for a while. There *is* a JT circuit
schematic in the middle of this thread, that contains the JT
circuit with some additional circuitry. Just delete the additional
circuitry...and there it is.  But it then doesn't tell you how to
wind the toroid, and Jeana controls the best toroid design.

The second problem is; This secondary microprocessor control
circuit is necessary to make the JT self running. That is, take
the JT's OU energy generated at time of use and restore it to
it's own battery as well as put excess energy into a supercap.
User Groundloop has done a really superb job on this control
circuit and this firmware. I'm sure he'll report his progress,
and you are right, once he does this I feel the circuit should
be ready ready for the "about one watt OU prize". Energy
has a time derivative so one can use a couple of 110V alarm
clocks to prove OU on you-tube. It has yet to be done
though.

:S:MarkSCoffman

[kooler]

i need to make my own thread.. even know they said i wasn't bother them
so i think i will make my thread called (koolers second stage joule thief circuits)
hahahaha.. ..
nah.. i will post somewere i am not getting in the way of their progress..

[jeanna]

Hi friendryan,
Welcome to this thread.

That circuit is only one of several that take a regular jtc or one with a secondary to a different level.
Kooler's circuit really qualifies for another level.
And, xee2's with the second transistor. etc

Have you made a few jtc's and a few with secondaries?
If not there is no time like now.

There are a lot of people around who know how to make them and how to do special things with them.
As far as I know, everyone is still following their interests and sharing their results.

Please join and share too,

jeanna