[BC] Re: Weekend remote, was Part 15............

[WFIFeng@aol.com]

In a message dated 02/18/2006 1:02:59 AM Eastern Standard Time, 
awolfe at Route24.net writes:

> Actually, you can glue a small mirror
>  fragment to a speaker cone, aim a laser pointer at it, and demodulate the
>  audio with a cheap Radio Shack photocell at amazing distances.

A photocell doesn't have a fast enough response time. You'd need to use a 
photocell fragment. The audio response of a speaker with a mirror glued to it 
wouldn't be too swift, either. Better to modulate the LED beam, directly.

...been there, done it... but not 1/4 mile away! At that range, you'd need at 
least some kind of optics on each end.

Willie...