Circuit simulator
    
        
    
    
        
    
    
        
    
    
        
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                Power supply (top element in the Meters section)
                Click on the power supply icon, to turn the power on or off.
             
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                Sensors
                The little round things on the meters are the sensors. You can drag to the circuit area.
             
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                Removing things
                You can remove things from the circuit by dragging them outside the circuit area.
             
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                Editing resistor values
                Double click on the resistor.