This book is an accompanying textbook for an introductory course in microprocessing. Using the Arduino IDE platform, it explains introductory electronics, programming, microprocessing, and data collection techniques to allow students to start designing and building their own instruments for research projects. The course starts from a beginner level, assuming no prior knowledge in these areas. The format of the book is that of a laboratory manual, which can be used as a stand-alone crash-course for a self-motivated student, or be directly adopted as a course textbook for an elective in a college or university context. This text was originally developed for PHC435 Pharmaceutical Data Acquisition and Analysis, and PHM1138 Electronics for Pharmaceutical Applications at the Leslie Dan Faculty of Pharmacy of the University of Toronto. The book includes various fun lab activities that increase in difficulty, and enough theory and practical advice to help complement the activities with understanding.