Hands-on experiments cover the basics of electronics and show how to design, debug, and build electronic devices at home. The material is presented sequentially from simple to complex, starting with simple experiments with electric current and ending with the creation of complex devices using transistors and microcontrollers. The basic laws of electronics are described, as well as the principles of operation of various electronic components. Shows how to make a security alarm, Christmas tree lights, electronic decorations, sound conversion device, combination lock, etc. Step-by-step instructions and more than 500 visual drawings and photographs are provided. In the second edition, the text of the book has been significantly revised, more accessible electronic components are used in experiments, and new projects have been added, including with an Arduino controller.