My first Raspberry Pi tutorial in C

This book is an easy tutorial to learn how to program Raspberry Pi GPIOs in C as well as to write clean and efficient C code for the Raspberry Pi. The describes a simple circuit providing three functions: 1) The unavoidable blinking LED (aka Raspberry Pi “Hello World!” project). 2) A speaker playing some random music. 3) A light sensor is used to switch on and off the music.