Joule Thief

[jeanna]

@jesus,
That is just what I was thinking. Thanks for the drawing.

@xee2...  ??   1 AAA and the bulb lights? I don't think so?

My AC only worked for 2 hours then started flickering. I touched a few things, then when I touched the copper around the xenon case, it went out (no flash) and has not gone back on no matter what I try.

Maybe I should put it on the stove! 

I guess I will go back and sort out Bill's final circuit, then xee's to see how they do.

I did get a new solder iron and I have 2 good cameras, so I guess I ought to make one of each?? Are there any changes from xee or bill I should know about?

jeanna

[xee2]

@ jeanna 

Photo is real. The AAA battery is a bit old by now.

Just follow my last set of instructions. That is how mine is built. One of the leads to the large cap goes to the negative battery clip, so you might want to use that instead of the clip if you are not using a separate battery holder.

Did you get another 2 hours out of battery, or just the 2 hours you got last night?

[timmy1729]

Thanks for answering the beginner's question, Jesus 

@Jesus


I measured like you said. What I got was that with or without the LED I was only measuring 1.4vdc. The mA was around 160 or so in both cases. The LED I am using is a Radio Shack 5mm High Brightness Pink LED #276-0019. The package says "FW supply 3.5V (typical), 4.0V (max)" and "FW current 30mA." Isn't the Joule Thief supposed to boost the voltage that it receives?

[nievesoliveras]

@timmy

The problem most likely is that your Joule thief is not oscillating.
This could be because of a wrong transistor or a shorted or connected wrong toroid coil.
The transistor from radio shack that always work for me is 2n2222. If I use 3904 0r 9014 it does not work.

Make a drawing on paint of how the coil is connected and we will start from there. Also change the transistor to a 2n2222.

Jesus

[innovation_station]

bout time you chimed in sparks...


lol


i just got back from 2 electronics shops ....wow what a day ...  got my switches the cheepest i have payed yet ...  got some special materials for some of my advanced tpu's lol 

and i got somthing real kool  

it has solved my problem or perhaps i did on the way home    lol

got the biggest diode and fastest i could find...   cost me 45 bucks for 1 diode

somthing like 600v 220 a   

i aint gonna blow it lol ...  nor is it intended for near those rates in my use ... 



ist

but seeing it made it click  i will blow no more fets ever lol