Keeping track of things like the temperature, humidity, and smoke level in your house is important. If you want to make your own system for doing so, Instructables user ICStation shows off how to use ...

Arduino is a network for open-source electronics focused on a technology that is easy to use. By giving a list of instructions to the microcontroller on the board, you can tell your board what to do.

An Arduino can be used to test the life of any battery with less than 5 volts, Boxall says. So, for a quick way to see how much juice your AAA, AA, C, or D batteries have left, build this ...