PIC On Screen Display project board PROJRS232 Order PROJTTL Order The On Screen Display project board GPS source code example. Video Clip On Screen Display Project Board Applications The project board can be directly interfaced to digital sensors & via RS232 to GPS, Sonar or POS units. Any composite video signal source, from simple board camera to sophisticated ROVcan be connected directly to the project board.     Keypads, buttons and switches can be added to the project board to drive a user interface or automatically indicate status. Text and graphics generated by the project board can be overlaid on the video signal. The project board can also generate its own video signal. The PIC on screen display project board provides a simple platform for the development of microcontroller driven text over video applications. PROJ-RS232 has an RS232 level serial interface for connection to a PC or equipment with an RS232 interface. PROJ-TTL does not have an RS232 level converter so microcontrollers can interface directly to the USART of the PIC16F628A on the project board at 5V TTL logic levels. Please see the 16F628A datasheet for the electrical specification of the USART. The project board is provided programmed with the serial interface command program. This allows the unit to be controlled from a PC or microcontroller software program. It also allows the character set to be redefined. The use of a PIC 16F628A allows for the use of the large amount of freely available source code on the web as the starting point for development. If you are not familiar with the PIC microcontroller check out our links page to get you started. Software Developement Example MPASM source code for interfacing the project board to GPS NMEA data, 1-Wire sensors, cash register data and the MSF time signal is available to aid development of PIC applications on the project board. Features: PIC 16F628A microcontroller for flexible development MAX7456 On Screen Display IC for video text overlay 256 user definable text and graphics characters Compatible with colour and mono composite video signals. 1Vp-p. PAL or NTSC Automatic selection of text over external video signal or self generated video signal 9 i/o lines on the 16F628A available for easy interface to sensors, keypads, etc. Project board connections and pin out. RS232 interface via DS275 level shifter and the PIC 16F628A USART 5V TTL interface via PIC 16F628A USART on STVPROJTTL Size 60 x 54 x 20mm High efficiency switch mode regulator ideal for battery powered applications Power supply regulated 9 - 12V DC via on board regulator or 5V DC directly to the board Power consumption 50mA Weight 20g RoHS compliance Please refer to the MAX7456 data sheet for a full specification of the device. On Screen Display Project Board documentation OSD Project Board connection documentation Variant Clock Speed Application Enclosure option PROJ-RS232 19.6608 MHz RS232 serial interface OSDSER PROJ-TTL 19.6608 MHz microcontroller TTL serial interface none Project Board Character Set The project board is provided programmed with the character set shown below. This can be edited, modified or replaced as desired using the Maxim software and our fontset software. Greek, Cyrillic and Hebrew character sets can be supplied as alternatives on request. All these fonts are included in the example software source code available separately. As shown below when the full video frame is shown there are 16 lines of text ( PAL ). In most cases on a monitor you will see only 14 lines in PAL, 12 in NTSC. Home Back Order © The BlackBoxCameraTM Company Limited 2009