Joule Thief

[jadaro2600]

@jeanna

There is a thing here in the US called floral wire - which is steel, and is coated with a green paint to keep it from rusting.  It's also cheap.

[TheNOP]

hmmm ramma garden wire is the next new thing in electronic circuits!

Maybe the us has some kind of garden wire. Is this paper coated steel?

OK down to specs.

NOP Please explain. You made steel (or iron, or aluminum) toroids (YEAY) and you said they are 2 inches I guess diameter. and some layers. I guess this is 2,3,4 layers thick, but how many turns are on each layer, please.

You welded the ends so it is a loop - right?

I am soo glad to hear this. I may go to the garden center in town to find some garden wire.

again...
Is is paper coated?

thank you,

jeanna

coated steal wire, kinda like bailling wire but smaller size.

yes, it is a loop, soldered, but not sordered with electrical solder.
use a spot welder or a semi.

0.075 inch = 1.97 mm, plastic, pvc ?, coated wire.
0.043 inch = 1.1 mm, without the coating.

1 inch high X 2 inchs diameter
12 turns = ~1 inch

.036 is 20 gauge, .048 is 18 gauge

[Mk1]

Idea _ ? _

[resonanceman]

@Gary, are you using a breadboard or are you soldering? I switched to breadboard back in January. It helped a lot.

Jeanna


I am  using  a breadboard ,,,,,,,it turned out that was the problem .     
It  turns out I  don't  think in breadboardese

It is working ...........but not  real well
It is  maybe  1/4 as bright  as my first  one .
The transistor is  pretty hot .     the transistor  on the first one  runs cool . .......both 3904s
The  difference  is the toroid and the  windings .......the  first was  a salvaged toroid ........ I put as many windings on it that I could fit .
The   new one is  one of my new black  toroid s.........and only 7 windings       
I am guessing that  the   new  toroid is not  fully satutating
I  am  using a pot for the  resistor  to aid tuning .



gary

[Mk1]

@all

When you wind the coil , you can experiment with many design , but some just don't work good or at all, it happens more frequently with the bifilar jt coils . I know my design works good but the best i don't know that.

Mark

@gary

More turns on the jt side is not always needed , to really test result , test the pickup coil output , the resistance at the base need to be under 1 k .


Ho gadget is back.