Theodore Johnson has written a new
article appearing on the Seattle Robotics Society
website that describes how to use quadrature encoders salvaged from
computer mice for robot PID control applications. The article includes
photos of each step of the process. Everyone with a few old mice in their
junk box has wondered if there's a way to use those encoders. Now we know.
There is a group in Britain that builds Micromouses, or maybe Micromeese.
See Micromouse UK at http://micromouse.cs.rhul.ac.uk/
A while back, there was a thing like a LOGO plotter that was connected to a
control box by a ribbon cable. This thing operated on top of a drafting table, but
gradually drifted off course so that large plots weren't done very well. It was just
one of several things that ddn't work very well in the early days of CAD.
See a short description of the Penman Plottter at: