This text introduces embedded controller systems using the inexpensive and widely available Arduino hardware platform and the C programming language. It is intended for students in Electrical Engineering and Electrical Engineering Technology programs at the Associate and Baccalaureate levels. Unlike many Arduino texts, this text does not rely solely on the Arduino libraries. Rather, it "gets under the hood" and directly accesses I/O ports, pins and DDR, as would be expected in a traditional college level microprocessor/microcontroller course. The companion laboratory manual introduces embedded controller systems using the Arduino hardware platform and the C programming language. Exercises include usage of seven-segment displays, switches and analog input devices; a reaction timer; PWM; an event counter and an arbitrary waveform generator.