Joule Thief

[nievesoliveras]

Jesus always does nice work ..what's really strange is with the 20k resistor, it's only drawing 1.6ma ..but when I try to measure, the light dims, otherwise, it's still just as bright as with a 10k resistor while drawing 6.7ma and not dimming when trying to measure current.

Is that the light singing or the toroids?

The toroid is the one that sings.
If you can hear it singing, that is a good sign that it is working.

Jesus

[nievesoliveras]

Man I had a hard time to get this going again,
That should teach me to wright it down before going in a different direction.
Well i was some what correct in the schematic, and yes the transistor makes all the difference in
the world.
I do work back and forth on the JT and Fugi circuits and easily confused.
So what is going on now.
The capacitor charges  up to 50 volts fairly fast and will climb if one has the patients.
The Brushed DC motor still works the same Starts out fast then slows runs this time at 5.4 volts
The brush less DC motor does not work at all when i connect it i get a big spark the same as if i
short out the cap, meter reads 0 volt.
This motor was out of a Bar Code reader, i have two more and may try with one of the other.
It may also be that it was on the verge of death and i just pushed it over the edge.

Tried the fan out of a PC power supply, wiggles the fan but does not run volts on cap are 3.9

Think I’ll steal the kids web cam while they are in school and try to make a video, i have never
done this so don’t hold you breath.

Great work all Some interesting things going on here

Change the capacitor to a lower voltage value and check the same motor again.
Those camera flash capacitors that are without any values printed on them are from 80 to 120uf and 350v.

Jesus

[nievesoliveras]

Ok, so I made a Mk2 toroid

4 turn Main, 4 turn Trigger, 4x22 turn secondaries

I have a n4401 NPN transistor, 2.2k resistor, 1 inch Mk2 Toroid and a 10uf 35v cap.

I have 3x10mm leds 28,500mcd 4.0v on 3 of the secondaries and I have the 3 led push light circuit on the 4th secondary.

Total draw 44.2ma

Leds work both ways, but if more than 1 secondary used, they must all be same polarity or they all shut off.

Amp draw goes from ~40ma to ~44ma up ~1ma for each secondary used. I.E. ~42ma when 2 secondaries are used.

I noticed the pulse frequency goes down, pulse width goes up and pulse duty goes up as I load each of the secondaries up.

I'm going to add a trimmer pot and try different caps and transistors to see what happens with the data.

Good job!

Jesus

[nievesoliveras]

@all,
Today I decided to make up a light chaser kitt  now what can I do with this thing?
Mabe solder a 330ohm resistor to the hi output of the LEDs and send the + to the base of a BC548 to allow the output of a JT to charge up a bank of electrolytics? then discharge them all into a battery? hmmmmm, I'll do a bit more reading up on this one. 

Maybe you are doing something great on all your small videos. But saddly I have not been able to see any one of them. My machine does not see that kind of videos. The ones that end with .3gp.

Do you know of any small free viewer?

@pirate
How you doing?

Jesus

[slayer007]

@ Slayer:

Great video! (5 stars)  I think you found a way to synchronize the 2 JTs.  Great work!

Bill

Thanks Bill

Yes putting the collectors togeather they go in sync.
When there in sync it only took 100Ma more to run the other one.

I'd like to add a couple more in sync and see what happens.