Here is an interesting microcontroller project similar to the video signal generation project that I have previously discussed. This is a digital multimeter that produces a composite video output that can be displayed on a television screen. He uses an Atmel AT90S1200 microcontroller. Check out this cool project.
Video-DVM is a very cheap DVM that shows how an output as complex as a videocomposite signal can be generated entirely in software: two I/O pins and three resistors are all the hardware required. Connected to any TV set it displays voltages, included max and min peaks, using both giant digits and an analog bar-display . A serial data output for computer data logging is provided, too.
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