BLACKMARBLE is an 8-bit videosynthesizer for the Eurorack system based on Arduino Due.
It makes use of the DueVGA library for easy programming of visual patches in the Arduino
programming language. Five potentiometers and four control voltage inputs are available
for modifying predefined parameters. Toggle switches can be used to further control the
software or to switch between voltage control, manual control using potentiometers, audio
reactivity using an audio input or combinations of all options for controlling patches.
The module is fully compatible with the Eurorack standard, but standalone operation is also
possible. BLACKMARBLE outputs analog video for easy processing and is made to be used
with old CRT TVs, but works with any device accepting analog video.
I chose to design the front panel as another printed circuit board since it is a very cost-effective
solution and provides interesting design opportunities using the silkscreen and soldermask layers.

Below some screencaps of the BLACKMARBLE in action. Captured from a CRT without any post processing.

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