/diy/ - Do It Yourself

Anonymous Wed Oct 22 16:13:07 2014 No.714724 [View]
File: 107 KB, 688x784, Levitating-Anti-Gravity-Lamp.jpg [View same] [iqdb] [saucenao] [google]

I'm trying to figure out an efficient way to drive three 0.5W LEDs.

I thought about using a joule thief with a Darlington transistor and placing the three LED's in series. The thing would work with 4 AA batteries, to achieve a power of around 7000-9000 mAh (- .7 efiiciency of Ni-Mh batteries).

But I'm sure there must be more efficient ways to power this, the LED's need 450mA in series for maximum brightness.

What about driver chips with inductors? Is there any popular one?

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/diy/ - Do It Yourself

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