Announcement

Collapse
No announcement yet.

40x4 Wiring Help

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • 40x4 Wiring Help

    I just got a 40x4 backlight lcd and mine is a little different then all the plans i can find on the web. I have one 16 pin connection and one 2 pin connection for powering the backlight. Im not sure how to modify the plans found on the sites. Starters my data sheet has Vee and no Vlc, is this the same thing? If anyone could help, id greatly appreciate it.

    Ive made a little page of pics and the data sheet of the screen.

    http://www.headlife.com/~jawbreak/mp3car/lcd.htm

    Thanks in advance.
    [email protected]
    FrodoSkinner v1.1

  • #2
    Well the 2 pin conector is for the backlight
    look for a A&K: KNAP KAthode = negative
    Anode = positief

    as for the rest
    peter3
    PETER - THE NETHERLANDS - DEVENTER
    sproggy 2.8,epia c3-800,20Gb 2.5", 5.6"lcd,touchscreen.

    Comment


    • #3
      Who is the manufacturer of that LCD? The one that I got from Timeline last year was by Optrex. I guess they've changed.

      Anyway, I made this schematic and pinout here:
      http://members.home.net/hardattack/densi.htm

      Good Luck

      [ 09-02-2001: Message edited by: BoominVolvo ]
      BoominVolvo
      http://olymp3.mp3car.com

      Comment


      • #4
        BoominVolvo, first off your awesome. Thanks for the plans.
        Yea, seems like timeline has new stock, this LCD was made by Densitron.
        I have a dumb question. Is the ground the negative part on the power supply?
        FrodoSkinner v1.1

        Comment


        • #5
          Yes it is. I grounded mine through the parallel cable housing (outer metal part with the unshielded wire inside.) Just an FYI: Don't ground the LCD to the vehicle because it will cause interference and the screen will have random garbage on it.
          BoominVolvo
          http://olymp3.mp3car.com

          Comment


          • #6
            Just saw this.

            The 16 pin block is for the data. The two pin block is for power, in my case one pin was +5v the other was GND. I used my keyboard connector to power those two pins. The others are hooked up to the parallel port
            current projects

            Comment


            • #7
              Potentially stupid question:

              BoominVolvo's wiring scheme says that pin 2 of the 16 pin block powers the Backlight. And Pin 1 is the ground... I thought the power for the B.L. was connected through the 2 pin block... Am I missing something?

              what would it look like if the 2 pin block was part of this scheme (using the Ps2 port for the power)?

              thanks in advance,
              Milesg

              [ 09-14-2001: Message edited by: milesg ]
              Near Completion: Intel P166 MMX, 32MB ram, 13GB Hard Drive, Keypad, 4x40 LCD. Sproggy MK2.6 ATX PSU. Win98SE with Winamp and Mark Zehnder Plugin. (Web-site: very soon)

              Comment


              • #8
                If you look carefully, there is a +5volt source there (the red wire). That needs to be connected to pin 2 of the LCD connector. It also needs to be connected to the backlight and the 10k contrast potentiometer.
                BoominVolvo
                http://olymp3.mp3car.com

                Comment


                • #9
                  Okay, I think I get it... I made a slight adjustment to your scheme as I understand it.

                  is this correct?

                  New Scheme

                  I apologize if my feeble mind can't comprehend this... I'm fairly new to this kinda thing, and I don't want to screw up my LCD.

                  Thanks, Miles
                  Near Completion: Intel P166 MMX, 32MB ram, 13GB Hard Drive, Keypad, 4x40 LCD. Sproggy MK2.6 ATX PSU. Win98SE with Winamp and Mark Zehnder Plugin. (Web-site: very soon)

                  Comment


                  • #10
                    I have this same LCD and I've been having a very difficult time getting it to work. My printer is set on ECP and I have followed boominvolvo's schematic however whenever I turn my computer on all I see is the backlight, and no characters or black boxes. I have tried adjusting the pot on the contrast but no luck.

                    Comment


                    • #11
                      wow, I can't believe we got a different pinout... I wonder if the new one will work.

                      Please let me know your findings (I'm starting to believe that I have to buy a new one ).

                      Thank you

                      -Miles
                      Near Completion: Intel P166 MMX, 32MB ram, 13GB Hard Drive, Keypad, 4x40 LCD. Sproggy MK2.6 ATX PSU. Win98SE with Winamp and Mark Zehnder Plugin. (Web-site: very soon)

                      Comment

                      Working...
                      X