Video overlay shield for the Arduino

Posted on Thursday, May 6th, 2010 in Arduino by Ian

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!

This entry was posted on Thursday, May 6th, 2010 at 8:28 am and is filed under Arduino. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

6 Responses to “Video overlay shield for the Arduino”

  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

Leave a Reply

Notify me of followup comments via e-mail. You can also subscribe without commenting.

Recent Comments

  • Drone: The LM7171 used in this very simple design can be simulated in LTspice with reasonable results at 10MHz using the non-encrypted PSPICE model from TI...
  • Jon Jackson: I would be interested in 1 or 2 of your circuit boards. Jon
  • Max: An actual Saturday "detector" built with the same hardware would use the precisely timed slightly varying length of the day (and some built-in astronomy data)...
  • KH: In the old days, these things remained on paper forever as whimsical scrawls. Today, they are brandished about on blogs for the entire world to...
  • KH: So he doesn't really know what he's doing. Yawn. It's sensor-controlled. It's not an oscillator. A leaf covers the window, you're toast. TLV3702? Overkill. The...