There are a lot of fun Arduino projects that you can accomplish with the company's nearly $25 boards.

Through December 16, Maker will let you name your own price for a bundle of e-books that will tell you all you need to know about building robots around Arduino and Raspberry Pi boards.

The system uses both an Arduino and a Raspberry Pi alongside a ton of various sensors to monitor the house. You can set up the system to send you alerts when something happens or just monitor ...