Spit out VGA with non-programmable logic chips

Bitbanging a VGA can be a tough task due to the timing requirements. Nevertheless Sven gave it a go and not only he bitbanged a VGA on an arduino, but he managed to configured an array of 7400 logic chips to output a VGA signal.

Consisting of two parts, his project first consisted in outputting a VGA signal on a monitor then talking about adding circuitry to take care of frame counting, geometry and color.

A simulator was first used to plan out the graphics, then a 7400 chip configuration was designed for the display.

Via hackaday.com

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