Laser Communication

[rakeshkool27]

Hello Friends,
I am doing a small project on laser communication from this website [url]http://captain.haddock.8m.com/laser/laser1.html[/url] . I want to know if anyone could throw some light of the working of transmitter on the processing of sound waves through the electret microphone to the IC2a i.e. LM358. How is the current through the laser being controlled.....Can anyone explain the working.

Thanks.
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