ATARI ST Video Audio VGA / Composite Adapter *

Adapter for connecting a VGA monitor to an Atari ST computer. 

It allows you to display high resolution on a normal VGA monitor and also low and medium on some monitors that support** the horizontal frequency of 15Khz.

- Button for selecting the graphics mode (High/low) to save the default mode when power up (hold the button down to save)

- Equipped with a jack for composite video*** and audio output using a video cable for the Raspberry Pi or by making your own.

- Switch for selecting HV or CSync synchronism*** (on pin 13 of the VGA connector). Useful for connecting a PVM monitor for example (with the appropriate cable).

- Trimmer to fine tune RGB levels, may need to be adjusted on some monitors.


This device is powered by the 12v present on the video connector. The very first Atari ST models did not have the pin connected to 12V so this adapter will not work.

The VGA connector may vary in shape and color.

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* The project from which this version is derived is open-source: https://shorturl.at/cgkE3
** A partial list of monitor: http://15khz.wikidot.com
*** The composite signal is not available in all Atari STs, nor is CSync synchronization.