Silicon Chip ("Spacewriter" 5/97) has a wand which uses a mercury
tilt switch. The switch goes to a 4093 gate with an adjustable RC to
optimise the delay

Electronics Today International, UK ("Latent Image Display, 2/94)
has a wand that's slightly different. It's a bench-mounted unit, driven
by a rotating cam, like a steam train wheel. The sensor is an opto-
coupler through a slot in the cam

The ETI News section in that issue has an article about large
LCD displays (a post from a fortnight ago). A US company called
FP Displays was at the time making 18" high LCD characters (under
the trade name Visilight) by a new dry-film process to give flexible (!!)
160 deg view angle, light-weight display modules, intended for
customer information units. The contact details given were FP
Displays AG, Bristol (UK) 0272 251 125

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