Video overlay shield for the Arduino

in Arduino by Ian | 6 comments

VideoOverlayShield is an Arduino shield that superimposes text onto a composite video feed. The board uses a MAX7456 on-screen display IC which is configured through an SPI interface. The MAX7456 stores 256 user-definable characters, so we’d guess it could also display icons and graphics with a bit of hacking.

Thanks for the tip Eric!

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  1. Red says:

    Now I see the way they make all those OSDs for RC helicopters ;-)
    Any interfaces for connecting/reading sensors?

  2. Anon says:

    Neat stuff, looks like if you want to add your own characters though, you need to start deleting characters from the pre-programmed character map. Shouldn’t be an issue for english peeps since most of the map is filled up with non-english characters.

    It looks like there are forced gaps between characters though, which makes it harder to make extra-big characters out of smaller characters. Still each character is 11 by 17 which is nice.

    • Sjaak says:

      By looking at the charset the characters (note chars 0xf5/0xf6) are at least adjecent don’t have a gap between them. Dunno if there still gaps vertical, but if there aren’t any a simple larger graphics is possible.

      • Anon says:

        Oh, hey, look at that, my bad

        I was going by the fact that the certain letters filled their pixel data from side to side and yet when they were displayed they showed a gap, but upon closer inspection it just seems that there is a gap because of the characters black border.

        I was wrong about character size too, it does 16×30 characters, and each character is 12×18

  3. matyk73 says:

    Is there a working library for this shield? If so does it support PAL?

  4. Mark33sv says:

    Hi, this support PAL/NTSC and sing CCTV Cameras?
    What about library ?
    I need to make a portable CCTV monitor whit ARDUINO

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