CHAPTER 5 Block and Circuit Diagrams Diagrams A diagram is a picture that replaces, or supplements, words as a description of something. One obvious type of diagram is the one that is used for flat-pack furniture, consisting of a set of drawings of the components at each stage of assembly. At a time when radio technology was the main part of electronics, books and magazines for the amateur used to contain similar diagrams (Figure 5.1). This is a component layout diagram, showing where the components were fixed and how wires were connected between them. This example is from 1932 and it shows a constructor's diagram for a radio which was, for that time, a fairly advanced design (my father built it). n Note A diagram like this of a simple circuit is very valuable if you are a beginner, because it