As electronics have shrunk and power requirements have gotten less demanding, it's no surprise that we're starting to wear our electronic creations. Today's microcontrollers are tiny micro-sized computers that can be embedded into many projects--especially wearables. And they are perfectly happy running off a coin cell or rechargeable lithium polymer battery. This issue explores the latest trends in microcontrollers, with a special focus on wearable and lightweight boards. With 34 projects inside, you can build everything from a smart watch to your own electronic garments. A special section on Intel's Edison tells you everything you need to know about this powerful, inexpensive, and lightweight board.