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Video conversion ( 41 ) :

A Simple Video Sync inverter circuit - takes TTL level sync from computer or video game and inverts it, uses just 7404 IC for the job
Circuit for Generating Composite Sync from Composite Video Rate this link
NTSC Synchronization Separator For Stable Triggering of Oscilloscope Video Waveform Displays - Have you been frustrated by video waveforms which are difficult to display on your oscilloscope? Do you have to readjust the trigger level every time the scene changes? This article describes a simple circuit that will allow a triggered sweep oscilloscope to provide the most important capability of a video waveform monitor, a stable display of the video waveform.
One-chip sync mixer - This simple circuit combines separate sync signals to one negative composite sync signal. This circuit is originally dsigned to hook up a CGA to display which needs composite sync signal. Can be adapted for other uses.
Sync separator includes AGC - this sync separation circuit has a gain-control circuit that helps to stabilize the sync-separation function
Using the LM1881 Chip - This is quite a nice chip, and has myriad uses. Since most game systems output the composite sync information along with the NTSC video output, and since most RGB monitors will not accept this extraneous info along with the sync, we need to remove the video signal. The LM1881 does an admirable job of this.
Video Sync Inverter Circuit - simple circuit to invert TTL level sync signals Rate this link

Do-it-Yourself VGA to YPrPb Cable - This circuit is designed to convert 60Hz VGA (480p) from a computer's VGA port and drive progressive-component outputs to an HDTV (or similar display device). This circuit converts the RGB colorspace into YUV and translates the HV syncs to the Y signal.
Luminance & Color Difference to RGB Video Converter - luminance (Y) and color components (RY, BY) video signals (YUV,YprPb) to RGB converter, design by

A Single SCART Interface for Video - In Europe, the external connections to TVs, set-top boxes, VCRs and other video peripherals are provided by a SCART, or Peritel, connector. Its pin-out is specified in EN50049. Depending on the SCART connector's use (TV SCART, AUX SCART, or VCR SCART) the connector is an input, an output, or both. In most cases, specialized ICs are used for the SCART interface because of the complicated switching required.
RGB to SCART wiring - Special cable to connect analogue RGB + CSYNC (TTL level) to SCART connector.

Luminance & Color Difference to composite video conversion methods - block diagrams of luminance (Y) and color components (RY, BY) video signal to composite video conversion
RY/BY/Y to Composite Conversion Methods - Here are some suggested methods for converting the RY/BY/Y component. The recommended methods are just block diagrams, not complete circuits.

AD724 Evaluation Board - takes RGB in from VGA socket made to work at TV scan rate with suitable software, outputs S-video and composite video, supports PAL and NTSC video formats
AD724 Evaluation Board Manual - takes RGB in from VGA socket made to work at TV scan rate with suitable software, outputs S-video and composite video, supports PAL and NTSC video formats
Analog Devices AD724 based RGB to S-video and composite video converter
Atari RGB to Composite Video Converter - The schematic described in this document converts the analog RGB video signal that is output by the ST to an NTSC composite signal which can be displayed on a colour or monochrome composite monitor, or on a TV set by adding a modulator.
Motorola MC1377P - VGATV schematics that takes in RGB and outputs composit video. This circuit is based on obsolete MC1377 IC.
Nexus Project Sky DigiBox RGB to S-VHS/Composite Converter - This circuit converts RGB signal to S-video and composite video formats. The circuit uses the motorola mc13077P.
VGA to PAL and NTSC converter - This circuits converts RGB signals to S-video and composite video. Circuit suports both PAL and NTSC video standards.
VGATV Version 2.0 - converts RGB from VGA to card to PAL composite video
Video-Standard Selection Circuit for the AD722 Using Low Cost Crystals - This is a color succarrier clock crystal switching circuit.

FBAS-RGB-Wandler fï¿½r TFT-LCD - PAL to RGB converter circuit, text in German, try
PAL - RGB Wandler fï¿½r TFT-Monitor - PAL to RGB converter circuit, text in German, try

NTSC (YC/RGB) to VGA RGB Scan Converter - This is a scan converter that converts NTSC signal (TV,VCR,LD or DVD) to VGA signal to output VGA monitor.
NTSC to VGA scan converter - This is a video scan converter to display NTSC video signal into VGA monitor.
S-Video to VGA Scan Converter
NTSC (YC/RGB) to VGA scan converter - This is a video scan converter to display NTSC video signal into VGA monitor. Normally, the VGA monitor occupies most desk top space, so that everybody will be thinking that if the VGA monitor can be used for video monitor.

CGA2SCART - circuit to connect CGA card to TV SCART connector
Connection of the TV set to vga/svga to a card Rate this link
Interface CGA/SCART - simple circuit which seems to support only 8 of the 16 CGA colosr
Interface CGA/SCART
TV RGB signal output from a SVGA graphics card - To achieve a CCIR conform TV signal with 50 Hz vertical interlaced refresh and 15.625 kHz horizontal frequency on most SVGA cards its possible to re-program CRT timing and generate output signals outside the normal specification range. Then some prety simple hardware is needed for rest of the signal conversion.
VGA to TV converter - The famous conversion circuit by Tomi Engdahl.
Vga to tv Converter - a simple conversion circuit
VGA to VIDEO IN for DOS - This project uses built a grayscale composite video adapter and a driver for your graphic card that makes it output tv-compatible-signals.
VGATV Version 2.0 - converts RGB from VGA to card to PAL composite video

Build your Own RGB to Component Transcoder - schematic also available in
Component Conversion Formula - This table has mathematical formular behind RGB to component video conversion Rate this link
Custom Resolution Guide for 1080i HDTV-HTPC-POWERSTRIP-RADEON
DIY VGA to component transcoder discussion Rate this link

Adapting a 19" color Apollo monitor for use on a PC - This circuit allows a PC to display video on an Apollo 19" color monitor, P/N 008398-001. These monitors are fixed frequency, 1024x800, 60 Hz vertical refresh, sync-on-green.
Amiga to SCART Cable
SCART RGB wiring

Homebuilt digital video TBC/standards converter - This project is a timebase corrector/standards converter with the following features: Two CVBS inputs and one Y/C (SVHS) input; CVBS, Y/C and RGB outputs available simultaneously. This device supports PAL BGHDIN, PAL M, NTSC M, NTSC-Japan, NTSC 4.43 and SECAM input standards. Supports PAL, NTSC and SECAM output standards. Conversion of 60Hz NTSC to 50Hz PAL is possible. The 525->625 line conversion is done using line interpolation. Device supports also freeze, inverted video and mirro image effects. Device has built-in black burst and colorbar features.