Joule Thief

[crowclaw]

New video on the Tube of a Super Joule Thief:

http://www.youtube.com/watch?v=EzlMHlnK2DM

I just found this and 2 guys pm'd me about it on youtube.  One guy said Lidmotor is already going to build one.  this circuit will work with an inductor made of only 1 turn of insulated wire, no core at all.  It uses 2 transistors, one npn and one pnp.

Worth seeing.

Bill

Hi Bill,
I left a reply to this in another thread of a circuit I use, see attachment.
BTW can you open it up and post it hear for me by any chance. Thanks Bill regards Merv.
       Electronic solid states setups / Joule Thief / Re: New Jewel Thief "Resonate LCR Circuit" Much less energy draw....       on: January 01, 2010, 07:11:46 PM
I use a similar circuit and it's very useful either as a self oscillating boost circuit or driven by an external oscillator. I made a simple white led bedside lamp run from a single niMH 1.5v rechargeable cell some time back. The circuit is quite efficient and 10MA-20MA is typical, also ready available inductors can be used. I have attached a copy my design, as can be seen it's very similar. Merv.

[xee2]

New video on the Tube of a Super Joule Thief:

http://www.youtube.com/watch?v=EzlMHlnK2DM

I just found this and 2 guys pm'd me about it on youtube.  One guy said Lidmotor is already going to build one.  this circuit will work with an inductor made of only 1 turn of insulated wire, no core at all.  It uses 2 transistors, one npn and one pnp.

Worth seeing.

Bill

I have not built this circuit yet, but I was planning to do it some day. It should work. Make the inductance as large as possible. It is not as simple as a regular JT and will be more picky about component values, but it does not need a toroid.

[innovation_station]

i dont think thats all that special eather bill lol 


i did much of this a few years ago now ...... lol and MANY MANY THINGS i dont talk bout !


agin i just posted a better tip not long ago ...  not the same as pnp npn darlenting ... but much better ... 

anyhow

what im doing now ...  KICKS A$$!

thank you!

W

MY LEDS ARE BLIND YOU BRIGHT!   have a look

[Pirate88179]

Crowclaw's circuit:

[kooler]

i have built this circuit long ago and it does perform quiet nice
you can change some parts and get the ma draw
and you can also build it with one transistor if you put the right cap
from the front of the inductor to the base of the transistor

http://www.joulethief.com/kit.php

the schematic is at the bottom of page