Turn old TV into audiovisual synthesizer

CRT TV tubes are almost gone leaving place for more modern TVs like LCD. But don’t rush to throw old school TV in to waste as it may still be useful or at least good material for fun projects.

Niklas Roy played around with one of these and came up with fun project called Lumenoise.

Basically this is an Atmega8 based pen like device that is able to paint geometric patterns on CRT screen led by sound. Thanks to cathode ray tube technology photo-transistor is able to detect particular line drawn on screen allowing MCU to detect exact position of pen on it.

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