Blinky, the blinking joule thief led.

[stevensrd1]

Just a blinking joule thief led. http://www.youtube.com/watch?v=gKIom1AazGs

[electrospark]

I made a blinking LED joule thief 5 months ago and it is still flashing!
I am using an energizer AA battery and it was only containing 1338mV when i first connected it!  
unfortunately i can't watch the video because i have limited internet.

Regards.

electospark

[MarkE]

A typical AA alkaline cell discharging to 0.8V can deliver 2800mAH or more into light loads, averaging 1.2V for 3360J give or take.  A high efficiency LED indicator can be quite bright with just 1mA.  Pulse that at 1/10th duty-cycle and the load is about 0.2mW.  If the JT circuit is just 50% efficient the circuit should be able to run on one battery for over 1 year.

[Pirate88179]

Also figure that a decent JT circuit can be about 80% efficient if it is made correctly, and that the led is never really "on" to full brightness...(I have never seen full brightness on any led flashing circuits I have made) then you might actually get out to 1.5-2 years.  Now if you used a D cell battery....

Bill

[electrospark]

My blinking joule thief is using 0.3uA at 1338mV so it draws only 0.0004014mW!
If i ever connect a small solar panel to it, it would run forever and be an over unity light!
The only problem is that the amount of light that it produce is so dime that it cannot be used.

Regards.

electrospark