Besides what you have seen so far in this book, there are several cool projects that can be implemented in a week or less. These include the following:
A smart alarm clock based on Raspberry Pi, with features such as custom alarm sounds, period, snooze options, the ability to report weather conditions, alert you about today's to-do list, and much more.
Home automation and home surveillance systems, a camera that works on motion, VOC alarms, mood lighting, lighting controls, and so on.
A sensor network, wired or wireless, to monitor various parameters around your house—temperature, plants, pets, and others.
A digital photo frame network that changes images across many frames, depending on the time of the day and so on.
Seasonal projects such as lights for Diwali, Hanukah, or Christmas.