On-Screen STV5730A Display Board PIC processor sou
2016-08-23
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On-Screen Display BoardWhat it does:This device uses the same kind of on-screen display chips that are used in things like VCR's and TV's. One end of this board plugs into your computer's RS232 (serial) port, the other end plugs into your TV's RCA video-in port. By sending it data from the computer, you can control the text (and ASCII graphics) that gets displayed on the screen. In the pictures below, I am using a small color LCD display, but this will work for any television or VCR with a RCA video-in plug. It can also overlay the same text onto in incoming video signal.Hardware involved:The OSD chip that I am using is the SGS-Thomson STV5730A. It is capable of displaying 11 rows x 28 characters on a standard television. Here is the datasheet for it.The whole thing is controlled with a PIC Microprocessor. The PIC16F628 costs less than $4, and has tons of features, including an internal 4 MHz oscillator, USART pins, 16 possible IO pins, 2048 bytes of flash program memory, 224 bytes RA
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