Monday, March 01, 2004

Bird Computer� 6502 Page: "How to obtain TV Video Output From an FPGA
This project arose from my desire to have color video output to a TV rather than an expensive monitor. Most of the sample circuits I've seen for hobbyist type video output use VGA output to drive a monitor. Interfacing to a VGA monitor is relatively easy and provides a high quality video output. But what do you do if you don't have a VGA monitor to spare ? Many hobby type projects do not have the memory capacity or performance to drive a VGA monitor. Even used VGA monitors in good working order can be relatively expensive. How about using a TV instead ? It turns out that interfacing to a TV is almost as easy as interfacing to a VGA monitor. I came up with the following two circuits, the first of which I've built, the second of which I'm pretty sure will work. Schematics for the circuits are here: vdac.pcx"

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