For my first excursion into things Arduino I had purchased the "Maker: Ultimate Microcontroller Pack" from RadioShack. It contains an assortment of components, i.e. LEDs, capacitor, resistors, various sensors, LCD display ...etc, as well as the Arduino Uno Rev 3 and the MakerShield prototyping "shield".
I had also purchased the PIR sensor and decided to make a simple motion detection alarm. It is very basic, even trivial, but it helped to ease me back into things electronic.
