Joule Thief

[innovation_station]

 

hummm 


did i say that lol i probally did lol .....

i think you may be able to tap it that way ...

i finished my 2nd round of secondaries ....   i now have 22 independent  1 turn secondaries all lighting leds ...  and guess what ... lol   

i still have my orginal out put i have not touched yet .....  i put a cap there the lights will not lite...


ist!

pics soon ....   might do another round ...  with out a load on it ...    will not read yet it powers a led ....   well i only did 1 of the 3rd round .. and i tryed a few things when i short the coil all the leds turn off ...  as well as when i connect the output all the leds turn off except the 1 on the out put disconnect it they come back on ...

weird

i checked out my little solar pannels and led flashlight .... it apears to be compleate junk the most i get off all 3 pannels is like .5 volts

so i tryed a 12v pannel i have and it reads 9v but it cant hardly run a jt....  with 1 led it barley blinks...   humm

[Pirate88179]

@ Gary:

Why not just use induction and get the full cycle in both other coils at no extra cost?  As long as the fields overlap, there does not need to be any wired connection and now you get 2 coils running full cycles for the cost in energy of one.  I have not tried this yet, but I will.  I read this in one of my electronics books on induction toroids.  Just my 2 cents.

Bill

[mdmiller]

I have a 330uF 200V cap hung off the secondary of my JT (my battery is a bit run down at 0.6V).  From the cap I am able to flash brightly a 2.5V standard filament bulb every 10 seconds or so .  This is an old style Christmas light strand mini bulb, not LED.  I believe these are .5W bulbs (it seems a 50 bulb strand is tagged at 25 watts).

If there were multiple secondary windings, how should they be ganged together to try to keep this bulb going ??  many thanks - Duane

[sparks]

   This post is to show what can be done with the jt circuit or any other oscillator for that matter like slappers dc to dc switch.  It involves torroidal transformers so I post it here for what it is worth.  The main thing to remember is that a coil which shows highimpedance delays it's current flow.

     A shorted highimpedance coil current will happen at a different time than the exciting magnetic saturation change.  This phenomenon can be exploited on a solid state level also.  Input spike on input winding saturates the core while inducing a voltage in a shorted highself induction coil.  The current in this coil is delayed not  effecting the impedance of the core to the exciter signal.  Then current flows in shorted coil and is inductively coupled to the load windings.  You could use two torroidal high frequency transformers for this.  Pulse the primary on one.  Feed the high voltage secondary to the primary of the second torroid.  Feed the load from the secondary of number 2  torroid.  Make sure to use a resonant lc setup to feed the pulses into the primary or exciter torroid.   An active element like an avalanche diode in series with the exciter torroid output winding  and the output torroid primary will  help the tendency of the circuit to drift as the core magnetic parameters change.  Active tuning of the oscillator always helps but the circuit should run with gain.

[Mk1]

@All

All ,the last experiment , i made a 4 turn bifilar jt , the pickup coil is 112 turn 30 wire , with a 1k resistor it gives me 22 volts , and on a 1 ohm 100 volts.