Appendix A. Circuit Diagram Symbols

Figure A-1 shows some of the most commonly used symbols in electrical diagrams. Understanding the symbols will help you interpret the diagrams in this book and the many schematic diagrams that you might find on the web or in other books. It’s also useful if you want to make your own diagrams for projects. You can find a more comprehensive list at www.kpsec.freeuk.com/symbol.htm.

Figure A-1. Circuit notation