B.E.A.M.
BEAM is an acronym standing for :
Biology, Electronics, Aesthetics and Mechanics
last updated Nov. 3, 2001

DIY : Mobile-phone flashlight
use at your own rise, with the press button version

Just happened to pick up a few "ultra-bright" white led. Don't know what's the coating inside the water clear case. Look interesting to me :-)
This look like an ordinary 5mm water clear led to most of us.

I'd say the voltage drop is 3.4V to 3.6V
My mobile phone battery from Panasonic :
3.7V 650mAh Li-ion type

What ? 3.7V ?  Perfect for this little "ultra-bright" white led :-)
On the mobile phone body, the -ve and +ve indicator are marked already.
Just hooked them up with little wires coming out of the body, so that I can put the battery pack back on without the wires getting my way.
This is it. Stick the "ultra-bright" white led into it and.....
...mega bright flashlight !! Hurt my eyes by looking at it :-)
Shine the light onto a piece of paper. Almost burn a hole onto it. Haha.
Led will be hot, so don't use it for too long.
 Use it at your own rise
press button is added
This little press button is recycled from a keyboard.
Press button orientation :
lower left : hooked up to battery -ve
upper left : empty, but can be used for further upgraded with another white led
upper right : hooked up to the cathode of the "ultra-bright" white led
lower right : clipped off to prevent short-circuit

Anode of the led is hooked up to the battery +ve
Using my pen to press the button. hurting your eyes yet :-) Well, it is hurting my web-cam for sure !!
Same pics as above, just brightening the pics in order to see better.
Use at your own risk
Use at your own risk
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