DOE-HDBK-1016/2-93ELECTRONIC DIAGRAMS, PRINTS, AND SCHEMATICSElectronic Diagrams and SchematicsPR-04Page 10Rev. 0Figure 9 PNP TransistorFigure 10 DiodeFigure 9 uses a PNP transistor. The same rules apply as above except that this time polarities ofpower must change to allow current flow.The same rules that apply to transistors hold true with diodes. However, diodes are simpler thantransistors because they have only one junction and conduct in only one direction, as indicatedin Figure 10. The diode symbol, like the transistor symbol, shows the direction of conduction bythe direction of the arrow, which is from positive to negative.Although these simple rules will not allow you to read all electronic schematics, they will aid inunderstanding some of the basic concepts.
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business