This guide was designed to help you with the connections and programming required when using Vernier sensors with Arduino. We’ve included many example sketches (programs) offered as starting points for your projects. They can save you a lot of time, because they already contain the code to read Vernier sensors. They were intentionally kept simple, so that you can easily see their functionality without getting overwhelmed with complex features. This guide can also help you learn how to use the Vernier Digital Control Unit (DCU) to control motors, LEDs, buzzers, and other simple electronics. Hopefully, after reading through this information, you will find an idea for some entertaining and educational projects.