Jeff, The big red button on the Cray is an off-the shelf Square D 9001KR25R "operator" (pushbutton for everyone else in the world) If someone is up to the challenge, I have the green version 9001KR25G that I can donate to VCF. Martin On 12/29/2016 9:56 PM, Jeffrey Jonas via vcf-midatlantic wrote:
In this day of IoT, this could be a FUN project Martin Flynn offered
Waveware SPS-5 transmitter with 4 pagers. That should be perfect! Pagers are retro. 4 of them mean some will always be charged and ready.
But the master station needs serial input from something. Let's see
- a pushbutton to the Raspberry Pi running the overhead video display, which ought to have motion and distance sensors to react to folks automatically. The "call button" could respond with a video - the cavalry is coming! Or one of a random assortment of science fiction talking computers such as the talking head from The Starlost or Red Dwarf.
- the big red button on the Cray
- setting the PiDP-8 console switches all "on"
- the Apple ][ serial port card. Evans' Lego robot could entertain them while waiting. For movie trivia, have it say "My name is Rags! Woof woof woof" :-)
-- jeffj