Design and Construction of an Optical Fiber Control System

Abstract

This project aimed to design and construct a control system uses 6 digital codes, which is done by using 8 PINs DIP switch to generate 8 bits digital code. This code had been modulated by a microcontroller adopting (OOK) amplitude modulation; the Bit duration is 25ms where all that was done by a source code programmed in C language and installed on the microcontroller. Also the microcontroller granted to do another function where it converts the signal from its parallel generated form into a serial form after modulation which is then carried-out into the form of an optical signal using a laser light source and it was transmitted and carried on an optical fiber cable to the receiver. On the other side, the receiver received the signal through an LDR which converted it from its optical form into an electrical signal form and as its characteristics was expected to be weak the signal was subjected to a amplification phase which after it was demodulated using a microcontroller where it also converted the serial signal onto a parallel form and showed it using LEDs.