DECADE ENGINEERING BOB-4 Application Note
BOB-4 is Decade's fourth-generation low-cost video information overlay module. BOB-4 lets your microcontroller or PC display text and vector graphics on standard TV monitors. With user-definable character sets, BOB-4 also supports bitmap graphics and multiple languages. BOB-4 generates background video on-board, or automatically genlocks to your video source and superimposes characters over the image. Printable characters and commands control BOB-4 through SPI or RS-232 style data links, much like a serial printer. BOB-4 links directly to most microcontroller chips and modules, including the BASIC Stamp. NTSC and PAL video standards are supported in a single product version. Field firmware upgrades are supported via PC connection. BOB-4 hookup is simple, requiring only serial data, video, and DC power connections for most applications.