Circuit Symbols

• Switch (open)

  
• Switch (closed)

  
• Cell

  
• Battery

  
• Diode

  
• Resistor

  
• Variable Resistor

  
• Lamp (Filament Bulb)

  
• Fuse

  
• Voltmeter

  
• Ammeter

  
• Thermistor

  
• LDR (Light-dependent Resistor)

  
• LED (Light-Emitting Diode)