In article <20060202225134.F0C4A8C00A4 at mini-me.trailing-edge.com>,
    shoppa_classiccmp at 
trailing-edge.com (Tim Shoppa)  writes:
  There are a lot of things to build that are not
"computers" in the
 box-that-sits-on-a-desk-with-disk-storage-and-CRT-and-keyboard realm,
 but are interesting electronics.
 Lots of fun is to be had playing with microcontrollers for all sorts of
 purposes.
 Analog computers are always imminently hackable. Try building a circuit
 for integrating the Lorentz equations for example. Turn a knob, and you're
 tweaking the constants! 
Don't forget things like building your own earthquake detector or
weather station.  I have a kit book for these sorts of projects.  They
are fun, cool to integrate with a uP for data recording/analysis and
are easy to build with low-cost components and electromechanical gear.
My interest in this sort of electronics is in making weird
electrokinetic sculpture type machines.  Survival Research
Laboratories, anyone?
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