Video Switching Circuit

Discussion in 'The Projects Forum' started by MrBozo, May 11, 2011.

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  1. MrBozo

    Thread Starter New Member

    May 11, 2011
    Hi I'm new to the forum and need some help with a circuit I have. The circuit function is to display 3 Video Inputs to 1 Video Output(7 inch monitor).

    I have built this circuit onto veroboard to test and it works to a point. Switch 1 is a momentary switch I selected so that ;

    On state displays navigation screen
    Press 1 displays Video Input 1
    Press 2 displays Video Input 2
    Press 3 displays Reverse Camera
    Press 4 back to normal state - navigation screen

    When Reverse Gear is engaged Camera Output is displayed as required.

    My problem is I only seem to get Video Input 1 to display then switch display goes blank and there is no Video Input 2 displayed. Switch Press 3 doesn't display Camera either. Switch Press 4 does revert back to Navigation Screen and so on.

    Then sometimes pressing the switch doesn't display Video Input 1 and display remains blank no matter how many times switch is pressed.

    Am I missing something within the circuit, is it the switching side ?.:confused: I have read about debouncing so could this be my problem. I have attached a pic of the circuit and switch I am using. I hope there is some genius out there that can help. :)

  2. bertus


    Apr 5, 2008

    Due to safety and / or enviromental issues I am closing this thread.

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