For my final project I have the following in mind:
The popcorn timer – This is a device that records the time intervals in-between the pops when making popcorn. When there is more than 3/4 seconds between the pops, then the popcorn are ready and the device informs you.
The shooting spammer – For every person that dies in the USA from a shooting a sound and blinking will go off. The source will be this and the output will differ depending on the incident.
The daily hunger-meter – A display showing the number of people who have died from hunger today. Source.