Joule Thief

[jeanna]

Thanks Alex,
It is great to have the clarification.

@Gadget,
I have been thinking about lidmotor's interesting modification, because it is NOT the same as just modifying the base resistor.

The base resistor determines how much the transistor is off or on. This changes the perception of brightness but not the actual brightness.
The proper frequency will make the joule thief work its best.
The rheostat (= pot in the pos wire leading to the joule thief) alters the maximum amount of voltage or brightness, possible when the transistor has turned on.

So they do different things, and I think it is worth noting.

The odd part is the resistance does not add up.
I am still not finished, because my best base resistance is 70 ohms.
I was following lidmotor's suggestion to make them add up and I tried a 47 ohm with the 20 ohm at the battery, and I could not really keep the light on and turn the rheostat. But then it did work when I removed the 35w bulb  used the 10w bulb as he did...

Now, I am wondering if I had the 70 ohms restored to the base resistor, would I be able to lower the incoming voltage with the rheostat? This should make the circuit use less while it is less fully on
I still have not soldered it so I can try this too.

jeanna

[innovation_station]

i agree j

i was going to do this with the sun circles ..  set the pot  to the colour of the led  ... use the watt pot ... for intinicty ... depending on growing cycle and plant .. 

and if i find some real investors .. for that ...  i would like to cross refrance plant needs to tuned lighting...  via slection .. veggie .. flower ... bla bla ..

but that is exactally how i was gonna do it .. and also if i matched the FLICKER EFFECT FROM THE LEDS IN GS GEROMERTY..  for the plant of choise from the database .. ... i can play it music and grow it fast ... no ?


agin ... my more advanced ideas...

w

i just finished all 8 coils  this is = to the high self inductance winding ..  it will be hooked up as 1 wire all 8 coils .. im doing that now ..  this is eather trigger or pulse ...  center collector is out put only ...    if it becomes anything other it will self destruct ...

ill add a picture ..

btw if your eyes are open ... you also see 2 triangles and 2 spinn minipulators ... in my design .... ; )

thank q lol

i did the math on  the 12 gage wire to equal to collector equals .. 27.12 feet so i will lap the pulse coil low self inductance winding ill add a picture when i finish it ...

[FreeEnergyInfo]

i agree j

i was going to do this with the sun circles ..  set the pot  to the colour of the led  ... use the watt pot ... for intinicty ... depending on growing cycle and plant .. 

and if i find some real investors .. for that ...  i would like to cross refrance plant needs to tuned lighting...  via slection .. veggie .. flower ... bla bla ..

but that is exactally how i was gonna do it .. and also if i matched the FLICKER EFFECT FROM THE LEDS IN GS GEROMERTY..  for the plant of choise from the database .. ... i can play it music and grow it fast ... no ?


agin ... my more advanced ideas...

w

i just finished all 8 coils  this is = to the high self inductance winding ..  it will be hooked up as 1 wire all 8 coils .. im doing that now ..  this is eather trigger or pulse ...  center collector is out put only ...    if it becomes anything other it will self destruct ...

ill add a picture ..

plyz viev...

http://x-faq.ru/index.php?topic=118.0

http://www.youtube.com/user/FreeEnergyInfo#p/u/65/gB9HlMUV0O4
http://www.youtube.com/user/FreeEnergyInfo#p/u/64/Tsw9SleQZ-I
.......

[gadgetmall]

Thanks Alex,
It is great to have the clarification.

@Gadget,
I have been thinking about lidmotor's interesting modification, because it is NOT the same as just modifying the base resistor.

The base resistor determines how much the transistor is off or on. This changes the perception of brightness but not the actual brightness.
The proper frequency will make the joule thief work its best.
The rheostat (= pot in the pos wire leading to the joule thief) alters the maximum amount of voltage or brightness, possible when the transistor has turned on.

So they do different things, and I think it is worth noting.

The odd part is the resistance does not add up.
I am still not finished, because my best base resistance is 70 ohms.
I was following lidmotor's suggestion to make them add up and I tried a 47 ohm with the 20 ohm at the battery, and I could not really keep the light on and turn the rheostat. But then it did work when I removed the 35w bulb  used the 10w bulb as he did...

Now, I am wondering if I had the 70 ohms restored to the base resistor, would I be able to lower the incoming voltage with the rheostat? This should make the circuit use less while it is less fully on
I still have not soldered it so I can try this too.

jeanna

Jeanna i have a pot on the base thru a 47 ohm resistor with this one and i can increase or decrease the brightness of the little Florecent lamp (square one) all the way to BRIGHT to dim but after it goes out i have to crank it up to high to light again and then i have control over it . Its possible to just regulate the voltage from the battery and leave a resistor on the base without a pot there . I mean put the reostate in between the battery and jt  ? I dont have awire wound one to spare they are on all my Bedinie's .

albert

[electricme]

@ Doug,

Mag wire scroungers ,when ever I'm looking for wire i go to the local electric motor shops where they repair commercial electric motors and offer to purchase the left overs at the scrap price which is what they sell it off at to be recycled with the wire they shred off burnt motors.
  I'm not talking about little bitty radio shack size rolls.The rolls I get still have many pounds of wire left on them sometimes they have 15lbs left on a roll.The rolls are really big honking ones like the type you would see used to stock rope. Plus these shops also save caps ,stock cap, collect caps. Boxes and boxes of caps of all sizes. The place I used to go to sells mixed boxes of caps by the pound.
  Check out your local electric motor shops.

Very true.
I once worked in a motor rewind shop for about 3 years, they would throw out spools into the reject "scrap copper" drum when there was not enough wire left on the spool.

Only trouble is, these days the price of scrap is high, so they never see it worth their while to sell it to anyone, out here in Aussie anyway.

jim