Joule Thief

[Pirate88179]

Jeanna:

Thanks, I tired you C-E led trick with the first transistor...no light.  That's one of the reasons I replaced the transistor.  # 2 does not light the led either and both transistors get really hot in like 3 seconds.

Yes, you are correct that I have everything hot glued and soldered in my Jeanna Light box and do not want to disturb it for a test light of the tube.

I will figure it out...hopefully.  Unless I am into a bad batch of TIP3055s?  The first one from this group worked great.

Very confusing but, I am sure the fault lies with me.

Bill

[jeanna]

Jeanna:

Thanks, I tired you C-E led trick with the first transistor...no light.  That's one of the reasons I replaced the transistor.  # 2 does not light the led either and both transistors get really hot in like 3 seconds.

This could mean the transistor is not turning OFF.
So,
raise the resistor really high, and watch the C-E light as you go. This will tell you when/if the transistor is going on.
It is possible that there is a short, and there is also the possibility that there is a spark inside the pot. If there is any small space between the wiper and the carbon, and you Do get a big single backspike, this could be making a short instead of a stream of sparks.
Of course the toroid wire,
or just a plain old short like a wire bending over too close to anything

I will figure it out...hopefully.  Unless I am into a bad batch of TIP3055s?  The first one from this group worked great.

Very confusing but, I am sure the fault lies with me.

The symptoms of too much magnetization on my transistors were that they were very weak, but also,
they would not turn on unless there was almost no base resistance, then when they did go on, the transistors got hot.

They are healing, btw. I moved all magnets out of the room and also moved the metal lamp that I had been using to store them, just in case. Those neos are really strong!

If you have some time,(ha) get one from the shack and try it. Either or any of the TIP 31, TIP3055, even 2N3055 will work if your house is warm enough.

this is good to go over this for all to see. I am positive we are not the only ones who are finding this kind of thing.

jeanna

[innovation_station]

SPARKS...

MK1

garden wire in between!  the 7 turn mags ... ?   lol

i may do so ...  bet it will help to contain it .. and pull secondary outs from .... 

im building ... 

probally go 10 laps ...  thats 70 turn ... 

and what if you short the secondaries ...   get a bigger mag feild ?   

ist! c

@ J ya!

it lit as it should ... if i was to fill the caps faster ...  it would run like in the wall  CONSTANT!

J  think about a HIGH RESISTANCE DIODE..... and low restance coil then in reverse ...

love you !       : p

[kooler]

jeanna
i will work on my old circuit more soon.. so i can show the uses of it
the only way to do it safe is to (start out small)
small output secondary and a cap three times larger than your output..
and make sure you have a load on the scr at all times

i been trying to make it with less parts.. and be able to build it in a bread board
its to strong of a circuit to not solder it.. it burns my holes in my bread board
and you don't need a ign coil to light small light bulbs
the ign coil is just a testing unit.. cause you can adjust it easier by looking at the spark for matching current and voltage going to the ign coil.. and after you tune it just right.. its time to put what ever you want on the output... just don't put 700 turns on one of those 3.38 toroids and run the output from the unit in to it....
my table is metal and i found a bare spot.. haha

[innovation_station]

well got it wound !  ended up 7 11 lol

jt 


then loggie comes in says uncle build throw the globe in it ....  lol 


; )

w

plasma globe ...  find a few batteries ...  lol   

i love the children / parents ... 

he also says dont forget the escape pod ......

here is a pic ...