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. It is shown how to make a security alarm to protect against home intrusion, Christmas tree lights, electronic decorations for clothing, a sound conversion device, a combination lock, an autonomous robotic cart, etc. Step-by-step instructions and more than 500 visual drawings and photographs are provided. For beginner radio amateurs