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Difficult! Might be, it is one of complaints from students when they took a control system course. However, it will not happen longer to one who has learned this book. Since, this book provides a fairly comprehensive and step by step treatment of the design of a PID controller. The discussion includes both design of hardware and software. It gives a complete guidance that includes a wiring diagram and a complete program of the design. In addition, the book reviews control system fundamental theory and gives a practical and basic way to building a control system program in the Arduino software. Therefore, this book is easily understandable and can be used by students, researchers, practitioners and hobbyists. The author also hopes that after reading this book ones are inspired to research in any certain area, especially for topic of energy consumption saving in refrigeration area.

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Erham, Eddy
Eddy Erham received the B.E (Ir.) degree from Bandung Institute of Technology (ITB), Indonesia in 1990 and the Master of Engineering (M.Eng) from ITB, Indonesia in 1999. He also had conducted a research in Control System area in City University, London, UK from 2010 to 2012. His research interests include instrumentation, control and refrigeration.

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