Electrical Symbols & Electronic Symbols in PDF 14 rowsElectrical Symbols & Electronic Symbols in PDF. The largest collection of symbols in the network in PDF format. For consultation and interpretation of components, devices and electrical SYMBOLSSYMBOLSActuators Electrical controlElectrical attenuatorAdaptability VariabilityElectrical boxes and conduitAlarm systems Security systemsElectrical currentsAntennas AerialsElectrical filtersSee all 14 rows on wwwtrical-symbols[PDF] Circuit Symbols of Electronic Components Component Circuit Symbol Function of Component. Lamp (lighting) A transducer which converts electrical energy to light. This symbol is used for a lamp providing illumination, for example a car headlamp or torch bulb. Lamp (indicator) A transducer which converts electrical energy to light.