Pulse Code Modulation Receiver Coding

[Skillet]

pcm modulation c code

I am part of a senior design project and we are building a system that unlocks a door using a laser as our transmitter.

We have the transmitter built and working, but we don't know where to start on writing the C code for the receiver.

At the moment we are directly modulating the laser to transmit binary data in the NRZ(L) standard.

We are using a set of PIC12F683-I/P's.

I have looked all over the net and have not come across a guide on writing and implementing PCM in C code.

Does anyone have any articles or sample code that we could look at to figure this out? I wish I knew more about this topic it does not seem that difficult.

Thanks

 

[bobcat1]

Hi

Why do you need to use PCM? - are u plan to transmit audio over laser?

whether you plane to use it to open a door all you need is modulate it with 1KHZ signal (use AM of FM modulation) and detect the 1KHZ in the other side using LM567

All the best

Bobi