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Thread: Did I wire my lcd right? 20x4

  1. #1
    g60 is offline
    Variable Bitrate
    Join Date
    Jul 2000

    Post Did I wire my lcd right? 20x4

    I just got a Optrex 20x4 lcd wired-up. I am going to use it with win98 / winamp, but can't get any plugins to work

    LcdPrint works fine, no problems there.
    LCDisplayer v1.0 will work, but I can only get it to work if I start it from the visualization menu. won't work when winamp starts up.
    None of the 3-4 other plugins I found will work at all

    This is how i hooked it up.

  2. #2
    Join Date
    Apr 2001
    Here, There, Everywhere


    if LCDPrint works its safe to say the wiring is correct.... so that is good.

    A long shot, but a problem i have had in the past..... when coding my own mp3car programs to use LCD's I have often had to alter the delay times between sending data to the LCD depending on the speed of the CPU running the system.

    Faster CPU/system.... longer delay to compensate, otherwise the data is sent too quick for the LCD to make sense of it. Also the length of the cable used. Just last night I was testing my soon-to-be new mp3car system with a 1.5mtr LPT --&gt; LCD test cable I made for development, worked fine with my software. I then tried the 5.5mtr cable to be used in the car (to go from the dash to the boot). The extra length caused alot of troubles, so I needed to increase delays.

    As you may/may not have read the length of PC printer cables can never be more than a few meters long or interference starts to be introduced. LCD cable setups are no different.

    To cut a very long post to an end..... do any of the plugin you are trying have delay settings? it may be that LCDPrint has a longer delay in its data transfer than some of the other programs you are trying?
    Project - GAME OVER :(

  3. #3
    Variable Bitrate
    Join Date
    Oct 2000
    Vancouver, Canada


    Sometimes the parallel port isn't setup properly. Like its not set for ECP or the range isn't set at 378.. things like that.

    Sorry I can't be more specific all I know is I tried my LCD with a notebook at it wouldn't display properly and I thought I hooked it up wrong until I tried another parallel port and it worked beautifully.
    95 Honda Civic DX Coupe - In Progress
    mp3civic site


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