Switch (latching) Switch (non-latching) NPN transistor PNP transistor
tech supplies Electronic
Components
Pictures and symbols
Light dependent resistor Photodiode Field effect transistor (FET) Thyristor Buzzer Loudspeaker
Microphone Thermistor Operational amplifier Schmitt inverter Lamp Light emitting diode (LED)
-
+
Ammeter Voltmeter AND gate NAND gate Motor Solenoid
V
200
600
OFF
600 V
200
A V
200
600
OFF
600 V
200
V M
20 A 20 A
200µ 200µ
2000m 2000m
Ceramic resonator Resistor OR gate NOR gate Relay Piezo sounder
Variable resistor Potentiometer NOT gate XOR gate Primary cell Battery
3V
Capacitor Capacitor (polarised) a.c. supply Transformer
+
Black 0 0 Black x1 Silver ±10%
Resistor colour codes
Semiconductor diode Zener diode Brown 1 1 Brown x10 Gold ±5% Earth Fuse
Red 2 2 Red x100
Orange 3 3 Orange x1000
Yellow 4 4 Yellow x10,000
Multiplication factors and symbols Green 5 5 Green x100,000
6
M mega 1 000 000 (10 ) Blue 6 6 Blue x1,000,000
k kilo 1000 (103) Violet 7 7 Example shown:
m milli 0.001 (10-3) Grey 8 8 blue, grey, brown, gold
µ micro 0.000 001 (10-6) White 9 9 = 680R ±5%