Electrical wiring diagram symbols list - There are two generally used capacitor symbols. One image represents a polarized (commonly electrolytic or tantalum) capacitor, and the alternative is for non-polarized caps. In each case there are two terminals, running perpendicularly into plates. The maximum essential of circuit additives and emblems! Resistors on a schematic are normally represented with the aid of some zig-zag lines, with two terminals extending outward. Schematics using worldwide symbols might also rather use a featureless rectangle, instead of the squiggles.
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The symbol with one curved plate suggests that the capacitor is polarized. The curved plate represents the cathode of the capacitor, which must be at a lower voltage than the high-quality, anode pin. A plus sign can also be brought to the nice pin of the polarized capacitor symbol. Variable resistors and potentiometers every augment the usual resistor image with an arrow. The variable resistor remains a -terminal tool, so the arrow is just laid diagonally throughout the center. A potentiometer is a three-terminal tool, so the arrow will become the 0.33 terminal (the wiper).