Brown Robert M., Lawrence Paul. How To Read Electronic Circuit Diagrams

Third edition. — Blueridge: Tab Books, 1972. — 193 p.The hundreds of parts that go into making a radio, Hi-Fi, or television set work are called ’'circuit components,tT the resistors, capacitors, tubes, coils, etc., that are necessary to the operation of any electronic circuit. All components arcidentified by a symbol on the schematic diagram of the equipment, much like the symbols an architect uses to show the stairs, doors, and walls on the floor plan of a home. The schematic symbol for most components simply tells you what that particular component is. It does not tell you what the electrical characteristics are, just as the symbol an architect uses for stairs does not tell you what land of wood they are made of. To find the value and ratings of any component, you simply refer to the parts list. If However, some components do have their values either stamped on them or printed in the form of color-coded dots or bands. This is the case with most resistors as welias some capacitors and coils. This color code is standard in electronics in accordance with established Electronics Industries Association specifications. An explanation of what this code is and how it works is provided in the Appendix. There are several ways in which a circuit component can be identified or described: by means of a picture or diagram, by a letter, and by a schematic symbol. Components discussed in this Chapter are identified by their standard letter designation and schematic simbol. Pictures or diagrams of all the many tipes of capacitors, resistors, etc., would fill volumes and be of little benefit here.