Joule Thief

[kooler]

@kooler

I do expect that you are recovered from your accident.
My question is:
Can you share the knowledge you found out about the kapanadze circuit with us?

I ask this because you posted earlier that you had figured it out.

Jesus

i said (i think i figured it out..) but when i get time to test it i will post it in the other section..
i have to strip down one my other setups to get the wire that i will need..
i think it is more of the sr193 device rather than the kapanadze..
but either one will be nice to have..

robbie

[nievesoliveras]

Thank you @kooler

[freepow]

  @ All

        I just tried this quick charger with green led using 2xAA batteries charging up a 55F Cap,
        when the resistor was at  zero "K"  the Cap started charging, as soon as it reached 1.8v,
        the green led lit up, so then we turned up the 1K pot to around 250 Ohm and the green led
        did not light up till the Cap reached about 2.0v, so this works great for a charger that lights up
        when Cap is full (depending on how high you want the 1k pot turned for the voltage on Cap)

        Anyhow in the picture on the right, I want to be able to switch B & C off from charge (A) when
        the cap is full, so the green led wont draw current from the Cap anymore, then I can use the
        charged Cap to power a JouleThief !  Does anyone know of a switch like that ?
       

[jeanna]

Hi Freepow,

What happens if you connect these open ends to a joule thief circuit?
I get turned around with things sometimes ( )
but it seems to me the jt transistor will be turning the battery off and the cap will fill because it is easier until it gets to the voltage to pass through the led, but before that the jtc should kick in.

Maybe a higher resistance would make it easier to tell?

Interesting question,

jeanna

[Pirate88179]

I posted some photos of this device a few pages back, but I finally got around to making the video:

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

This is another practical application for the JT circuit.  It is helping my Mom recognize that her door is locked and the battery life so far is fantastic.

I have not had much time to do much of anything in the way of experiments lately but finally, I was able to make this short video.

Bill