TVC Communications on Twitter: "One of the first mechanical televisions used a rotating disk with holes arranged in a spiral pattern. This device was created independently by two inventors: John Logie Baird
Mechanical TV: How it works
John L. Baird, one of the TV pioneers, and his mechanical TV in 1925.... | Download Scientific Diagram
Mechanical television - Wikipedia
Mechanical TV: The very first television format war
William Osman: Mechanical TV and Camera
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Print an Arduino-Powered Color Mechanical Television - IEEE Spectrum