If you can Blink and are looking for more cool experiments to do with your Arduino, this second book in the Saturday Afternoon Low Cost Electronics Projects Series is for you.In Arduinos Without Tears, the first book in this series, I showed you a dozen experiments you can do with just an Arduino and nothing else. With a few simple sketches we leveraged the compute power of the tiny microcontroller to do real science experiments, like testing your persistence of vision, the properties of random numbers and measuring static electric fields.