Power electronics is a rapidly developing field of technology, the purpose of which is to reduce the weight and dimensions of the power supply devices of electronic equipment and electric motors. Today it is impossible to imagine a computer, a video camera . DVD player, TV without a compact and reliable pulse source. Unfortunately, in recent years there has been an acute shortage of literature on this topic. The second edition of the book has been largely revised and supplemented. Affordable language tells about the basics of designing pulsed power supply devices, about the promising element base, the features of its application and the optimal choice, practical designs are given Details are told about "difficult questions" and "pitfalls" of circuitry . Non-traditional directions are also affected, such as the creation of high-frequency ballasts for daylight lamps and electronic power factor correctors .. The book will be useful to specialists-developers of power engineering, university students, repair specialists and radio amateurs.