A monorail.
500 Feet long, held two passengers, guts were a rewired electric wheelchair.
http://www.flickr.com/photos/espressobuzz/5008514139/in/set-...
500 Feet long, held two passengers, guts were a rewired electric wheelchair.
http://www.flickr.com/photos/espressobuzz/5008514139/in/set-...
Loved this, was a very very ambitious project, sadly I didn't get to see it working. :-(
In the same vein I made this this year:
http://www.flickr.com/photos/bendelarre/5010762637/in/set-72...
A 16x16 array of RGB LEDs on which we ran animations generated by the community on a website. (Yes, I know, its still software related...I can't help myself!).
This picture is neat: http://www.flickr.com/photos/espressobuzz/5008514139/in/set-...