Although you can buy a wide range of shields for Arduino, making your own will not only save you money, it will give you more flexibility and control of your designs. This book shows you how to connect sensors and other devices to your Arduino inputs and outputs using basic components like resistors, diodes, transistors, and op-amps. All of the components used in this book can be purchased cheaply on eBay or Amazon, as well as other electronics outlets. Dozens of generalized circuits that you can modify for your needs are shown, complete with the necessary equations to select the proper...