Changes

=== Week 2 - Digital input/output ===

* USES OF THE ARDUINO ON THE WEB:

** to make a 3d scanner http://hackedgadgets.com/2009/04/02/3d-arduino-scanner/

** with 2 servos (to be demonstrated), and an IR range-finder: http://www.acroname.com/robotics/parts/R144-GP2Y0A02YK.html

=== Week 3 - PWM, Analog Output ===