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Electronic componets and Computer Communication

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brainW85428

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Hello everyone, I am knew to the board.

I am working on this project now and having problems.
What i want to do is to have a IR laser over my door and whenever someone walks in it breaks the beam and someone transfer that into the computer and have it execute and command or have a status that my program can find.


So simple break down of the simple overview,
1. The laser's path to the receiver is broken
2. When its broken, it executes a command on my computer

Simple, but so hard. Any advice?
I have a basic background in electronics and programming, so thats not a problem. I just do not know what to look for.
 

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