This book, a collection of hardware-based projects which appeared in Electronics For You from year 1979 to 2004, is brought out for the benefit of our new readers. It is a compilation of 60 construction projects tested at EFY Lab. The book contains projects with comprehensive functional description, construction details such as PCB, component layouts and parts list. Some projects also cover testing steps, equivalent part names of some hard to find components and lead/pin identification details of semiconductor devices and integrated circuits (ICs).