[Hot News] Kevin Hadfield's Four-quadrant LED scanner

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[Hot News] Kevin Hadfield's Four-quadrant LED scanner

Postby moderator » Tue Feb 20, 2007 11:22 pm

<h3>Kevin Hadfield's Four-quadrant LED scanner</h3>

I just received the 30th anniversary issue of the Newsletter and read Kevin Hadfield's article with great interest ...it seemed a bit long until I realised that the second page of text had been repeated as the third page! That sort of thing can happen all too easily with computers.

It occurred to me that the spinning cylinder idea could be adapted to my father's "bank of lamps" large screen that he demonstrated in 1930. An unforeseen problem with that screen was the immense heat produced by 2100 flash lamp bulbs, but if the assembly was mounted on a rotating cylinder the heat would have been dissipated!

Malcolm Baird July 2005
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