The Arduino Video Overlay Shield is based on the MAX7456 on screen display chip.
The Arduino compatible shield board overlays text on analog video, therefore
it allows easy overlay of text onto an analog video signal, NTSC or PAL.
Just plug it on an Arduino processor board to get started.
The shield is created by Lowvoltage Labs.
I wanted to use it to display the subject line and address of incoming emails while watching tv.
Another use could be a osd system to display flight data on rc planes.
Unfortunately the board needed a 27 Mhz crystal and I could not get my hands on one.
As soon I got one I could not find the board anymore,...
Meanwhile I found it and finally assembled it. The board worked out of the box, except the processors character set is Japanese by default! Luckily I could find a European standard Ascii character set and some code to upload it. The character set text file size is 170 kB and the upload took about three minutes.
Now the hello world output does not look so strange anymore.
A fine board and a interesting new chip, what could you possibly ask for more ?
One final but important note, do not forget to insulate the osd output plug, because it will most certainly short out on the Arduino Usb plug.
|Osd shield ready for action|
|Osd shield top side|
|Osd shield bottom side, please do not forget the insulation on the video out side plug|
|Hello world test osd over webcam input|
Dangerous Prototypes Video Shield Announcement
Seeedstudio sells assembeled boards
Arduino forum thread