10 May
1998
10 May
'98
10:06 a.m.
On Sun, 10 May 1998, Pete Turnbull wrote:
As coincidence would have it, I just picked the following up at a thrift
store today:
The Carroll Touch Input System from Carrol Touch Technology, Champaign,
Illinois. The schematics are from July 1979. Apparently an entire
company was formed just to produce these LED array touch screen things!
-- Doug
BTW, does
anyone remember Steve Ciarcia's homebrew touchscreen articles
in Byte? I have the reprints somewhere, and it works in the same way as
the HP150 touchscreen - IR LED/detector pairs around the screen.
I've got that reprint somewhere, too. "Let Your Fingers Do The Talking",
Byte August 1978 and September 1978. A 16 x 16 grid of emitters/sensors.
A box near the ned of the article says "An industrial grade alphanumeric
terminal incorporating touch panel input is being manufactured. For
information contact: General Digital Corp, 700 Burnside Av, East Hartford
CT 06108".
Another box says, "NOTE: Any one building a unit from these designs should
be advised that they are covered by a number of patents by the University
of Illinois and may not be sold for profit".