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RGBs to composite conversion

Discussion in 'General Electronics Discussion' started by Jeba, Nov 7, 2016.

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  1. Jeba

    Jeba

    2
    0
    Nov 7, 2016
    Trying to convert a video signal (RGBs to composite) and purchased a converter(Weiya CV-04). This converter has R,G,B,ground,sync,con2 on the input side. Has a composite, RCA output(as well as s-video). Power is 5-12DC. I am getting clean image out except the entire image scrolls slowly up. I have a RGB and one sync wire which I soldered to the corresponding inputs wires. Not sure what the con2 wire is for. (Maybe Vsync if there was a separate Hsync and Vsync coming from the device). If I hook the output to different LCD screens it behaves differently. On one it is perfect, on another it scrolls faster in the opposite direction. Does anyone know what the problem is? And a way to fix it? Thanks in advance for any help.
     
  2. HellasTechn

    HellasTechn

    1,556
    215
    Apr 14, 2013
    Can you confirm the quality of your PSU ? it it stable or rippling ?
     
  3. Jeba

    Jeba

    2
    0
    Nov 7, 2016
    No rippling that I can tell. Only scope I have is a Fluke123
     
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