Gordon JC Pearce wrote:
http://woodgears.ca/marbleadd/index.html
I reckon that's on-topic no matter what.
Watching the thing work brings to mind the head positioner on the
Univac Fastrand FH drums--basically solenoids driven by each bit of
the head position address (e.g. 8421) and via a system of levers,
translated to a physical head position.
How's that for on-topic?
Cheers,
Chuck