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Home | Product Categories | Breakout Boards | BOB-09168

Breakout Board for MAX7456 On Screen Display

sku: BOB-09168 RoHS Compliant

Description: This is a breakout board for the Maxim MAX7456  monochrome on-screen display chip. The board is set up with all supporting circuitry and RCA connectors to allow the user to easily interrupt and overlay text and/or graphics onto a video signal (PAL or NTSC). Just plug in your video signal to "Video In", plug your TV into "Video Out", connect a microcontroller to the SPI interface and supply the board with 5V@100mA (worst case) and you're good to go. Supplied sample code runs on an ATMega168/328 (16MHz) and compiles with WinAVR, so it's just about "plug-and-play" with an Arduino board.

Features:

  • Input voltage 5V
  • Current consumption 100mA, worst case
  • 5V SPI interface

Dimensions: 1.8x0.9"
Weight: 0.30 ounces, 8.6 grams

Documents:



Pricing

30 available

39.95
35.96
31.96

30 in stock

price
10-99
100+



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images are CC BY-NC-SA 3.0

ASCII version


Comments 31 comments

  • Patrick D | about 2 years ago 3

    Any chance we could get the blank PCB only?

  • cmdrdan | about 3 years ago 1

    Please fix the links to the datasheet and schematic as they point to the DDS chip and board….

  • KillerSpud | about 3 years ago 1

    Can we get a screen shot of this thing in action? It looks pretty cool, but what can it do?

  • Rooster | about 3 years ago 1

    I used a MAX7456 to make a virtual dash for my car using the OBDII port. I have a video on youtube, search for ‘edash virtual dashboard’. I included a link but don’t know if it will work??
    One thing to watch out for on the MAX is that the character set does not include all ASCII characters, but you can reprogram the font.
    http://www.youtube.com/watch?v=pYwoqfysGJA

  • pyctam | about 2 years ago 1

    I have attached video-out from video camera to “Video In” on the OSD board and “Video Out” from the board to the video-in on TV. But it seams that there is no any signal on my TV. So, what’s wrong? Should I do something different?
    OSD board is getting power from Duemilanove, on +5V/GND pins I have ~4.92V. Unfortunately I can’t see output on TV at all. it seems that OSD board is not passing through any video signal. Camera —> TV works OK (on AV3), but Camera —> OSD —> TV does nothng. For tests I use plain DVD handycam and home TV (PAL).
    I also tried to disconnect SPI pins, just to power the OSD board and check whether board is transparently passing video signal or not, but it also was unsuccessful.
    Is there any way to measure video signal on input and output on the board or understand whether OSD board is properly working or not?

    • frank26080115 | about 2 years ago 4

      I’m going to take a wild stab here and tell you to make sure that the RST pin is pulled high

      • pyctam | about 2 years ago 1

        Hi,
        Thank you very much for the assistance, it’s seams that I have
        progress in solving problem with my board.
        I have just tried to use RESET pin (tied +5V and reset pins for the
        short time, just touch them) and it seems that that board works
        properly :–) it’s a good news. Unfortunately after 4-5 seconds video
        output on TV is missing, so I have to tie them again. Does it mean
        that RST and +5V pins must be tied permanently?
        Regards

        • AndySh | about 2 years ago 2

          Yes. Take a look at the datasheet, page 10, and you’ll see reset pulled to +5V in their “Typical Operating Circuit”.
          FYI, the bar over the reset can be read as “NOT” reset. In other words, when the pin is high (+5V power being applied), you do not have the chip in reset, or in more straightforward terms, you want to use the chip. When this pin is pulled low (to zero), you are resetting the chip.
          What you’re essentially doing per your description is power cycling the board repeatedly by pulling the pin high for short periods of time, which is why you’re getting the sporadic operation.
          Cheers…

  • Spartan001 | about 2 years ago 1

    Any chance you could use a basic stamp with this?

  • Skimask | about 2 years ago 1

    Any chance the RCA jacks could be rotated 90 degrees so the board could be mounted inside a box with the in and out jacks next to each vs. on opposite ends of an enclosure?
    To me, it looks like it’s possible with just a little bit of re-engineering the board, a couple trace cuts, desolder, rotate, a couple jumper wires and…done…

    • brewer | about a year ago 1

      Consider also you can mount a pair of jacks to your enclosure, and run wire connecting these “internal” jacks with the external…

  • Bakchos | about a year ago 1

    Can this be use to stop the blue screen on display when there is static ?

  • Member #122163 | about a year ago 1

    am working with pic 16f877a, can you give me a sample code for any pic

  • Member #122163 | about a year ago 1

    i cant read from the module, any data read will result 0, also i cant display anything .

    the data from the pic to the module is just like the datasheet ( i see it on digital oscilliscope)

    what is the wrong?

  • robot256 | about a year ago 1

    Question to those who have used this before:
    If you feed it a color video signal, does it convert it to monochrome in the process of overlaying text? Or do you get monochrome text on top of color video?
    Thanks.

    • robot256 | about a year ago 1

      Answered my own question. On one of the AUV forums are screenshots of it overlayed on a color image. Awesome!

  • Member #195598 | about a year ago 1

    i need code to interface PIC18f2550 with Breakout Board for MAX7456 On Screen Display

  • KiwiJohn | about a year ago 1

    If you’re having trouble working out how to add custom characters into the NVRAM, I’ve put up some simple instructions at http://www.john.geek.nz/2011/01/adding-custom-characters-to-the-max7456-video-overlay-generator/

  • Qema | last year 1

    I made a small VB app to design custom graphics for this chip.
    QMIG

  • swort | about 11 months ago 1

    Arduino sample code?

  • Member #146970 | about 10 months ago 1

    Any chance to have a naked version one day without the RCA connectors.
    eg : UDB OSD

  • SPARKSTER | about 9 months ago 1

    would it be possible to get an arduino sample code for this compiled as a pde arduino file

  • Member #135963 | about 9 months ago 1

    I have a camera connected to a display and that works fine. When I hook the camera up to this, I get no output. When I look at the signal on the oscilloscope, the camera output looks like it’s shorted to ground, and the signal goes from a strong NTSC down to 0. Reset is pulled high and board is powered at 5 V.

  • Korken | about 9 months ago 1

    I’d like to tell of an error in the PCB design.
    The datasheet specifies:

    “Selecting a Clock Crystal

    Choose a 27MHz parallel resonant, fundamental mode
    crystal. No external load capacitors are needed. All
    capacitors required for the Pierce oscillator are includ-
    ed on-chip.“
    Yet you have included the capacitors. Why have you done so?

  • Member #200507 | about 7 months ago 1

    A slight technical note:
    according to the datasheet the 22pF capacitors (C4 and C5) for the crystal are not needed as internal load caps are there in MAX7456.

  • gjl_api | about 4 months ago 1

    Can this chip be used to output vector graphics? Has anyone here done that? I have looked over the datasheet for the chip several times before and did not see a way to do vector graphics, only text (characters), but I was never quite clear about it either. Thanks for any help.

  • Member #45103 | about 4 months ago 1

    How many lines of text can be overlaid on a screen?