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HOW THE FIRST TV SIGNAL WAS TRANSMITTED
How It Works UK
|Issue 208
A century ago, John Logie Baird demonstrated a working television transmission
On 30 October 1925, the first television transmission of a moving image was demonstrated. The engineer behind this feat, John Logie Baird, created this broadcasting technology using a simple mechanical disc system. Called a Nipkow disc, it had holes in it that formed a spiral pattern, with each hole observing and relaying one line of the image being televised. A motor was used to rotate the disc, powering the rotation at 12.5 revolutions per second. Areas of the image that reflected less light through the holes produced electrica
This story is from the Issue 208 edition of How It Works UK.
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