VGA Connector - Adapters

Adapters

There are HDMI to VGA and DVI to VGA adapters, and VGA to SCART converters.

For a simple VGA to SCART adapter cable to be viable, the display card must have sufficient features. Namely the ability to provide interlaced output and adjust the frequency, number of total scan lines and number of visible lines (the actual resolution) to match those of the prevailing TV standard. Signal incompatibility rises from the fact that SCART uses composite sync, so either display card must be able to do so too, or sync signals must be summed with a simple circuit. Additionally some TV sets may require 1 volt on SCART pin 16 as explicit signal to use component instead of composite signal. Likewise, three conductor analog RGB signal uses composite sync on green, but a converter circuit for to achieve that is simple as well.

HDMI/DVI to VGA adapters do not carry the audio channel. Separate audio cables are used.

HDMI to VGA adapters generally won't be useful as most displays can't read analog over the HDMI port. The display's EDID can still be read.