Turing Alarm Clock
this PIC-based alarm clock makes you solve arithmetic operations before it will turn off. Source and schematic included.The design is free and open source.The design is powered by a PIC16 microcontroller, which manages the user interface and keeps time. It displays the current time and the arithmetic challenge via a cheap lcd from all electronics.
   The Turing Alarm Clock
Go to The Turing Alarm Clock website
www.cheaphack.net