: The basics of one-way current flow and power conversion.
The solid-state revolution Van Valkenburgh describes ends around 1965. The book was published before the 555 timer (1971) and the first microprocessor (Intel 4004, 1971). If you want to learn about logic gates, flip-flops made from NAND gates, or op-amp circuits, you will need a different book. Basic Solid State Electronics Van Valkenburgh Pdf