Second Stage Joule Thief Circuits

[innovation_station]

i hope most understand ...   what i hold in my HAND... 

that a is a magnet triggered eather pump...  0 imputted engery...  just the swipe of the magnet ...

it needs to be imporved ..

concept is sound 

long ago proven 

william       

[Mk1]

@all
ist made one watch http://www.youtube.com/user/innovationstation#p/u/22/Jiodkjo9hpk


I hope this will help !

First thing tuning, on step one the green coil is put on tight leaving room so that two other coil (for the jt)can be added 180 degrees
apart, the green coil needs to be connected to a diode bridge to get voltage readings .

On step 2 , you start adding jt coils one at a time and check voltmeter every time you put more turns , that way you see the difference it makes continue adding turns until the voltage on the voltmeter start going lower, this will mean you have reached the point where you start messing up with the turn ratio , meaning you add more you get lower voltage.

On more step i do is every time i change the jt numbers of turn i also tune the base resistor , usually a pot of 1k is used, you try to get the highest voltage on the voltmeter . i also keep the voltage data and the resistance at the base by checking the resistance used by the pot in the circuit.

At this point you will know that you have the right number of turns on the jt coil, and the green coil number of turns fitting in the toroid,.

At that point based on results decide to use smaller gauge the get more turns and higher voltage .

You will also have a good idea on the toroid working range.

To make a good design , you need to learn about the toroid first at this point you should have a good idea about doing so.


Step 3 , Start putting pickup coil on the toroid, you need to put the coil on both sides going one way and leave wire to come back over the coil the other way on step 4.Making a cross windings.

If you want more pickup coil , you need to put them all at the same time , so make sure to remember the green coil for the room available  .

Lets say 20 turns fit , then on a mk1 you should have about 20 up then 16 down , mk2 having 2 pickup coils on each side numbers would be 10 up 6 down , you get the idea.

When you need more then 3 pickup coil , twist all those wire into a single one then do it all at once.

Now why the cross windings , you will then have the coil pushing and pulling , you can test it with a led that will now light both ways , it also helpful in charging caps.

I hope did not forget to much, i would really make a video but , i really don't have any money to buy a camera
, and none of my friends have one, but honestly most of my time and energy is on putting food in my stomach.

Mark

How to test dead spots use a single turn pickup coil , then connect it to a bridge and voltmeter and move it around the empty space left on the toroid , if you find a spot where there is no voltage that is a dead spot.

What could i have new to say ?

Nut much , but if i was to try this i would first try to find the best gauge for the jt side (bigger wire ) then try the match them gram for gram , since they will have the same mass and materiel they will share resonance at any freq.

The smaller you go on the secondary side , bigger resistance higher turn ratio for mass , same mass smaller gauge .

I think this will make sure that the current is not lost due to unmatched weight ...

Depending on the winding direction you get different sine wave .

Winding rotation direction , can help setting kick generation (+or-), when working with multiple core.

I hope this will help

Mark

[Groundloop]

All,

I'm sorry to report that the self run board does not work as planned.

Today I did build and test the board. The SCR does switch on at approx.
1,6 volt but they do not switch off again. So when the battery feed back
scr switch on then the current available is big enough to keep the scr on.

Another problem is the forward current Germanium diode. This diode is
direct in line with the input AA battery via the coil. So when the discharge to
load SCR switch on then there is a DC current through that diode and to
the output load that keep the SCR on all the time.

I also tried to use a separate winding on the toroid. But the output from the JT
was above the 8mA SCR switch off current, so the discharge SCR just stayed on.

My conclusion is that this circuit does not work with the JT circuit at all.

Alex.

[innovation_station]

i found my speck test sheet that came with those w core 140 mm toroides .. i have pictured ..

it says 5 turns ..

this it the # from the test sheet 

ZW49740TC

PERMEABILITY SAYS MEAN MESUREMENT  OVER 10 TESTS   8546.23

FREQ MIN AND MAX

8276.1        15369.9   

and the weird thing at the bottom of the sheet last part ... 

says ..   special costumer specifications supersede standard procedures..   odd..  i just noticed that ..



ist!

i also found the speck sheet for the SPECIAL RECTIFIERS..
PART #STTH200L06TV
TURBO 2 ULTRAFAST HIGH VOLTAGE RECTIFIER..
FETURES AND BENIFETS ..
ultra fast switching..
low reverse current
low thermal resistance..

this is 600v 220a  it is the same unit magnacoaster is useing or was ..  i by fluke was in the shop .. and his order was there ..  so they sold me 1 lol 

i was told  all thease are counted ..    aperntly they know where these are sent they are  special units .. 

btw i think this core was selected to comply within the fcc guide lines... i found it to scream well from a aa .. any where from 1.2k to 1.5k  must be a harmonic...  of the core  there is much room for play there so that is a good thing!

[jeanna]

Wow ist,
That is a really big variation!

thanks,

j