Ling SM wrote:
> I have spent some time playing around with the 1W Luxeon LED to do 1km 
> optical data transfer.  But base on my experiments so far, the LED has 
> problem overpowering the daytime sun.  And the limited 500mA peak 
> current for a 350mA rated LED does not hel.  But the low peak current 
> still puzzle me.  The latest 1.54A LED will not do unless its peak 
> current can take more abuse.  Anyone has data to fault the brief datasheet?
> 
> So I am jumping over to the laser diode camp.  I had sent out some 
> enquiries?  To cut short this process, do piclist have some references 
> and shops (online) of liking.

Just out of curiosity, are you:
a) using lenses to focus your LEDs?
b) using lenses to focus your receiver?
c) using long tubular light shields on your receiver?
d) using modulation of some sort on your LEDs?
e) using AC coupled, high gain, demodulation stages on your receiver?

Most of the above will also be needed with lasers as well.
What baud rates are you hoping for?

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