Schematics / Video
Video Line Selector
When measure video signal with oscilloscope, video line selector is very useful to find a scan line. The line selecter generates trigger pulse at selected line, oscilloscope will display only selected line...
RF Modulator
Computers, video games, video cameras, games computers; all of these produce video signals that must be displayed via a television set. If the TV receiver in question does not have a video input...
Video Line Sync Trigger Generator
Here is a circuit that will allow you to trigger your oscilloscope on specific lines in a video signal. This is a feature found in either very specialized or very expensive scopes and is a must for anyone who is developing or working with NTSC or RS170 video systems....
S-Video Source Selector
Connecting a DVD player to the S-video input on a television produces an amazingly sharp picture. However, what if you have more than one device that generates S-video but only one input on your TV? Then you'll need this simple switch to select between the two sources....
Remote Controlled AV Switch with S-Video, Composite Video, and Audio
After plugging the new DVD player into the s-video connector of the big screen TV and seeing the image, I knew there was no going back to composite video. A few weeks later I purchased a programmable remote to control my home theatre system and I became a highly-optimized couch potato....
Frame Grabber w/ Parallel Port Interface
The design is based around the ubiquitous BT218 video A/D converter and interfaces to a PC via an EPP compliant parallel port. This circuit was designed by Doctor W. A. Steer in the U.K....
Video Message and Clock Generator
This circuit allows you to superimpose a title and/or the time and sate on an incoming video signal - very useful when editing video tapes. It's also a good introduction to video signals and processing...
PIC Tetris Game
This circuit by Rickard Gunée allows you to build a complete Tetris game from a single PIC16F84. All video signaling and pattern generation is done in software...
Video Pattern Generator 
Here's a two chip design from Marcelo Maggi that provides a wide range of pattern generation for video testing...