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Serial port control problem

Discussion in 'General Electronics Discussion' started by xp95, Jun 13, 2010.

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  1. xp95


    Jun 13, 2010
    Hi everybody,
    I am working in project which aim to control 80 device through serial port.
    First ,I made a simulation by Proteus and virtual port
    Second, I used Micro C for Pic programming
    Third, C# 2008 for computer interface

    The simulation Succeeded but when i try to apply it on 8 devices in reality its failed ( LEDs open randomize)

    Can any on tell me the reason?

    Here all project files
  2. LTX71CM


    May 23, 2010
    How are the eight devices connected? Do you have eight RS232 devices sharing the same port? Are each of the eight devices identical but addressable? More info about your project would help here.
  3. xp95


    Jun 13, 2010
    I put all project files in this link - online file sharing and storage - download Final.rar
    which include some pictures of the circuit and simulation files.

    How are the eight devices connected?
    I put Rs232 to Rs422 conveter to be able to control over than eight devices then connect it in to PIC16F877A in to register 74HC595 which appear in this picture

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