VGA Synthesis: High Frequency Digital Audio Oscillators as Direct Visual Drivers

Audio output 1, 2 and 3 of an RME FireFace UC interface are used to drive the red, green and blue pins of a VGA signal at 640 x 480 @ 60Hz. Audio oscillators at a sampling rate of 192KHz are used to as a source to drive the signal. A simple Max patch is used to control and output the oscillators. An Arduino is used to generate the horizontal and vertical sync.

VGA Signal Video Synthesis: Teensy 3.2 as Source

Pins 0, 1 and 2 of a Teensy 3.2 are used to drive the red, green and blue pins of a VGA signal at 640 x 480 @ 60Hz. The code is quite straightforward but can be tweaked and pushed quite far. An Arduino is used to generate the horizontal and vertical sync.

VGA Signal Video Synthesis: Using a Basic No Input Mixer Setup as Signal Source

A Xenyx 302USB mixer is set up feeding back into itself, and the output is used to drive the red, green and blue pins of a VGA signal at 640 x 480 @ 60Hz. An Arduino is used to generate the horizontal and vertical sync.

VGA Signal Video Synthesis: Connections

I'm interested in controlling a VGA signal directly, using various kind of signals. A VGA signal is made up of five main components: red, green, blue, horizontal sync, vertical sync.

I've made a cable that has RCA connections for RGB, TS for horizontal and vertical sync and the other end terminates in a 15 pin VGA socket. Note that both the horizontal and vertical sync TS connectors have 68 ohm resistors built in.

The horizontal and vertical signals are generated via an Arduino. There are many examples around of code that will allow this. In this case, a 640 x 480 field is generated at 60Hz.