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Battery
Resistor
Capacitors
Diode
L.E.D. (Light emitting diode)
Zener Diode

Transistors

Ground symbol
Potentiometer
Light bulbs
Photo resistor (Light dependent resistor)
Transformer
Various symbols for relays

Switches

Electric motor

Fuses
Circuit breaker

Overloads
Thermistor
Variable resistor
A/C sine wave
D.C. (Direct Current)
Rectifier bridge

Alternator
Left = Wire connection point
Right = wire going over another wire. No connection.