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HOW TO READ CIRCUIT DIAGRAMS CIRCUIT DIAGRAMS 90-8 SYMBOLS (EXCEPT CONNECTOR AND GROUNDING) Devices appearing in circuit diagrams are indicated by the following symbols. WIRE COLOUR CODES Wire colours are identified by the following colour codes. If a cable has two colours, the first of the two colour code char- NOTE: *: No code indicates 0.5 mm 2 (0.0008 in 2 ). Cable colour code in parentheses indicates 0.3 mm 2 (0.0005 in 2 ). ACX02377AB Battery ACX02378AB Buzzer ACX02379AB Capacitor ACX02380AB Electrolytic capacitor ACX02381AB Variable capacitor ACX02382 AB Coil ACX02383 AB Diode ACX02384 Light emitting diode AB ACX02385 Photo diode AB ACX02386AB Zener diode ACX02387AC Dual filament bulb ACX02388AC Single filament bulb ACX02389AB Fuse ACX02390AB Fusible link ACX02391AB Horn ACX02392AB Motor ACX02393AB Pulse generator ACX02394 AB Piezoelectric device ACX02395AB Resistor ACX02396AB Variable resistor ACX02397AB Speaker ACX02398AB Thermistor ACX02399AB Transistor ACX02400AB Photo transistor CODE WIRE COLOUR CODE WIRE COLOUR CODE WIRE COLOUR CODE WIRE COLOUR B Black L Blue R Red Y Yellow BR Brown LG Light green SB Sky blue − − G Green O Orange V Violet − − GR Grey P Pink W White − − NO. MEANING 1 <F>: Flexible wire <T>: Twisted wire 2 Wire size (mm 2 )* 3 Basic colour (colour of the cable coating) 4 Marking colour ACX01279 AB <F> 1.25 G B 1 2 3 4 Example: |