I wrote this book to encourage you to venture into the assembly of small electronic devices, often featured in magazines, the internet, and technical books in the field. In many years of practice in the professional and teaching field of electronics, I have always encountered young and seasoned enthusiasts fascinated by electronics but lacking the courage to move forward and actually build something. Technical electronics magazines, books in the field, and thousands of websites on the internet provide a vast amount of information on various areas of electronics, ranging from small power supplies to sophisticated homemade spectrum analyzers! However, only a small part of this information reaches the beginner assembler in terms of what should really be done, starting with a brief description of the circuit and going into final details such as calibration and usage (sometimes). In the middle of this "Via Crucis," information is minimal but necessary for the beginner, such as drawing the layout of a printed circuit board, which is the difficulty in numerous assemblies. Other topics, such as reading schematic diagrams, layout, and designing boxes to house small projects, using test equipment, locating faults, almost never appear. The location (availability) and replacement of electronic components were not forgotten.