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Thread: Looking for pinout Videoton keyboard VDN 51521 (TYP: 52501)

  1. #1
    Join Date
    Dec 2012
    Location
    Russia, Moscow
    Posts
    109

    Default Looking for pinout Videoton keyboard VDN 51521 (TYP: 52501)

    Hello,

    Looking for keyboard pinout and protocol description, presumably from Videoton terminal:

    0e88ed6367325315101c76b7cfdde136.jpg

    d648b4f4e76a3c46d29f6c1e9db4007c.jpg

    I want to connect it to modern PC with help microcontroller converter.

    Thank you.

  2. #2
    Join Date
    Dec 2012
    Location
    Russia, Moscow
    Posts
    109

    Default

    Up^. PCB has three 74LS155 IC, five 74LS38. Sketched a piece of the circuit connected to the cable... Any ideas on how to control the keyboard?




  3. #3
    Join Date
    Dec 2012
    Location
    Russia, Moscow
    Posts
    109

    Default

    I mistake! Right circuit


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