Cambridge AssessmentInternational EducationElectrical and electronicsymbols listDesign Technology 0445,0979Use this symbols list for exams from 2023.Version 0.3For the purposes of screen readers,any mention in this document of Cambridge IGCSECambridgerefers to Cambridge International General Certification of Secondary Education.PathwayCambridge IGCSE and Cambridge IGCSE(9-1)Design Technology 0445,0979 Electronic and electrical symbols list.MPrimary orsecondary cellBatteryAC supplyTerminalAmmeterVoltmeterMotorCrossing ofJunction ofDoubleconductors withFrameEarthFuseconductorsjunctionno electricalconnectionPreferred switch symbolsSPST switchSPDT switchPTM switchPTB switchReed switchRelay SPSTAlternative switch symbolsRelay SPDTRelay DPDTResistorVariablePotentiometerresistorNTCLight dependentOperationalCapacitorPolarisedthermistorresistor (LDR)amplifiercapacitorNPN transistorPNP transistorSignal diodeLight emitting diode(LED)PhotodiodeCircles may be missing from semiconductor symbolANDNANDORNORNoT(inverter）Schmitt inverterMicrophoneBellBuzzerLoudspeakerSignal lampFilament lampHeatingelementwww.cambridgeinternational.org/igcse2School feedback:'While studying Cambridge IGCSE and Cambridge International A Levels,studentsbroaden their horizons through a global perspective and develop a lasting passion for learning.'Feedback from:Zhai Xiaoning,Deputy Principal,The High School Affiliated to Renmin University of ChinaCambridge Assessment is committed to making our documents accessible in accordance with the WCAG 2.1 Standard.We're alwayslooking to improve the accessibility of our documents.If you find any problems or you think we're not meeting accessibility requirements,contact us at info@cambridgeinternational.org with the subject heading:Digital accessibility.If you need this document in a differentformat,contact us and supply your name,email address and requirements and we will respond within 15 working days.Cambridge Assessment Intemational Education,The Triangle Building,Shaftesbury Road,Cambridge,CB2 8EA,United Kingdomt:+440)1223553554email:info@cambridgeintemational.orgwww.cambridgeinternational.org©UCLES April2021