http://www.mrs.bt.co.uk/dubus/9002-3.pdf
Simulates an RWI circular, sonar-guided robot in a flat 2D world. Includes a physical simulator, sonar, and laser rangefinder simulators. The simulated robot has internal odometry, one or two laser rangefinders, and 12 sonar sensors. You can design your own 2D floor plan. No source available.
http://www.cs.utexas.edu/users/qr/robotics/flat/
Synopsis of first vinyl recording cutter and cartridge for playback.
http://www.badenhausen.com/VSR_History.htm
which batteries are best, many NiMH batteries tested
http://www.imaging-resource.com/ACCS/BATTS/BATTS.HTM
68HC11, IR, LCD, motor control
http://handyboard.com/
Provides images and equipment details.
http://www.heavenlyview.com/
Tips on turning an RC toy car into a mobile robotic device using a Tecel F100 80C251 controller.
http://www.geocities.com/hobby_robotics/
focus on nitrogen and dye lasers
http://technology.niagarac.on.ca/people/mcsele/lasers/
and how to use it (including specifications)
http://www.mcc-us.com/i2cHowToUseIt1995.pdf
Broad variety of information on line from The Tone Lounge.
http://www.tone-lizard.com/Tube_Testers.html