Joule thief that could light the whole house

[conradelektro]

For some reason inverters have a problem with leds. The brightness of the leds was measured and is the same as when run on mains power. Plus this circuit is much cheaper and runs cooler than an inverter. Maybe you could build it and see. Can the inverter keep lighting the lamps on a dead battery like this can? ( Down to 2.4 volts). I doubt it.
Power supplied by the 12 v battery was measured at 6 watts , Pretty good I'd  say.

So try it. You'll like it.

Light brightness is not easy to measure. You need a light meter
http://www.ebay.com/itm/cmltzone-Digital-Light-Meter-Lumenmeter-200000-Lux-Illuminance-Tester-LCD-/252442663566?hash=item3ac6c15a8e:g:4VkAAOSweWVXc0l4
and a rigorous measuring protocol (best in a box, always the same distance between light meter and light bulb).

I played endlessly with many Joule Thief type circuits and once I got a lumen-meter and learned how to do the light measurements I saw the light. Eye sight is a poor judge of light brightness.

One should not exhaust a 12 V battery down to 2.4 Volts.

There a 12 V LED-lamps for campers, cars and boats, then you need no converter just connect them to the 12 V battery:

http://www.ebay.com/itm/2x-12V-LED-T10-WHITE-LIGHT-Camper-Bulb-Globe-Garden-Wedge-5SMD-Car-Parker/111914619862?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D37254%26meid%3Df55b1b8ba4a34c19b6739ce38996c192%26pid%3D100005%26rk%3D4%26rkt%3D5%26sd%3D121597979142

But if you like your Joule Thief circuit, it is fine with me.

Greetings, Conrad

[CG2016]

Proper measurements were made, using the exact same criteria in both cases . It functions as advertised. And you can use the batteries you assumed were dead, to run it.
By the way there's something new called an ultra capacitor and it doesn't care much how low it goes etc. Hardly ever goes bad.

[SkyWatcher123]

Hi cg2016, thanks for showing video, could you please post circuit drawing and build details, thanks.
peace love light

[CG2016]

Details of the build are mentioned on youtube video description or comments.
I will be making a new video of the updated unit in about a week or so
Here's  a video from a couple years ago of my first unit. The new one is an improved version of this one.
https://youtu.be/og81-4iDyHU

[Cherryman]

Great sharing!


You know if there is a 220V version  also?