Joule Thief

[Pirate88179]

@ All:

I have e-mailed Big Clive and have invited him to pop in over here to see how his circuit has evolved.  I will let you know about his reply.

@ Jeanna:

I love that light of yours!  All that light from the small toroid too.  Just amazing.

Well done.

Bill

[electricme]

@Jeanna,

Thats a very nice table lamp you have there, looks like you are the first to make one, ahem!! 

@all,
Got my circuit pen out again and whistled up another testing circuit.
This time it "taps" into the inner and outer turns on the JT, it could also be modified to "tap" on to every quarter turn but would be pritty difficult to make but not impossible, another method would be to make a rotating winding joule thief. This would give the ultimate "ultra tuning" joule thief.

enjoy

jim

[electricme]

@all,

Here is what I meant by a ultimate tuned joule thief.
The L1 and L2 winds are placed on the plastic aircore (I have drawn only L1). you could use bare copper or steel wire.
Then a tiny brass pully with a groove makes contact with the L1 turns, but only contacts a small spot, the tube is rotated, the brass pully rotates and it automatically "travels" along its sliding shaft following the wire, this action allows the L1 coil to be tuned at any degree giving a full tunable frequency range so one could ultra fine tune their rotating JT.
Just watch your volt and current meters to get the best output from your setup.

The "tube" has PVC end caps glued to both ends, place a single small bolt in the middle of each end cap, make up two L shaped brackets, drill a hole in each L bracket just a little smaller than the doomed bolt, the pressure of the L brackets supports the PVC pipe and gives it the rotational moment thats needed.

jim
   

[freepow]

Hello All

Special Thanks to Stefan, I'm back on OU again, and thanks to Jim & Bill too! for pointing me in the right direction.

Just thought I'd mention that the 20xLED light bulb that I am powering is a 240v input not a 110v bulb, so I may only be able to light one 20xLED light bulb on mine, Dunno yet though,  I have not tried two of them so far.
Still experimenting.

@ Jeanna, your camping light is great too!

[Pirate88179]

freepow:

Good to see you made it back.  I look forward to seeing more of your work.

Bill