7. Circuit Symbols
Switches
Push-to-Break Push Switch
Switch (push-to-make)
On-Off Switch 2-way
(SPST) Switch/On-on
(SPDT)
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8. Circuit Symbols
2-way
Switches Switch/On-on
(SPDT)
NC
COM
NO
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9. Circuit Symbols
Resistors
Resistor Rheostat Potentiometer Preset
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10. Circuit Symbols
Capacitors
Capacitor Capacitor, Variable Trimmer
polarised Capacitor Capacitor
+
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11. Circuit Symbols
Diodes
LED Zener Diode Photodiode
Light Emitting Diode
Diode
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12. Circuit Symbols
Meters
Digital Multimeter Analogue Multimeter
Voltmeter Ammeter Ohmmeter Galvanometer
V A Ω
Copyright All Right Reserved 2009 : kry... Studio
13. Circuit Symbols
Output Devices
Lamp Lamp Buzzer
(lighting) (indicator)
Motor
M
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14. Circuit Symbols
Audio
Microphone Earphone Loudspeaker
Amplifier
(general symbol)
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15. Circuit Symbols
Transistors
Transistor NPN
Transistor PNP
Phototransistor
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16. Circuit Symbols
Sensors (input devices)
LDR
Light Dependent Resistor Thermistor
Copyright All Right Reserved 2009 : kry... Studio
17. Circuit Symbols
Integrated Circuits (Chips)
IC 555 IC M66T IC 741
Timer IC Melody IC Operational Amplifier
8
7 4 2 2 7
1 6
6 3 3
4
3
2 1 5
Copyright All Right Reserved 2009 : kry... Studio