Finally-here is a book of electronic circuits that any hobbyist or technician can afford to build. All can be assembled for under $25. Gauthier includes the necessary diagrams, as well as complete specifications for every circuit. Logically organized & extensively indexed, the book should prove a useful addition to any electronics bookshelf. Gauthier includes audio circuits, digital circuits, alarms, & displays, as well as optoelectronic circuits,...