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SIMPLE CIRCUIT EXERCISE USING CROCODILE TECHNOLOGY

SIMULATION SOFTWARE - BATTERY, LED AND SWITCH

V. Ryan © 2004

 

The circuit seen below can be built using Crocodile Technology® electronics simulation software. The software allows the circuit designer to build a circuit on the screen of a computer rather than building a real circuit out of expensive components. It can then be tested on screen. Furthermore, the software allows ‘pictorial’ representations of the components to be used rather than circuit symbols. This makes the circuit look more realistic.

By now you should have a good understanding of LEDs and a limited knowledge of resistors. Build the circuit seen opposite using simulation software.
When the switch is closed the LED lights.

 
 
 

1. If the battery is 9 volts, what role has the resistor?

 

 

 

2. Using simulation software, build the circuit seen opposite. This time do not use the pictorial setting, use actual electronic symbols.

When the switch is closed the LED should light.

3. Build the same circuit but this time remove the resistor. When the switch is closed the LED and the switch will explode. Why is the LED destroyed?

 
 
 
 
 
 
 

 

 

FURTHER EXERCISES:
1.
Build a circuit using simulation software - composed of a 9 volt supply, a switch, a 380 ohm resistor and two LEDs, arrange in series (one after the other). What do you notice about the brightness of the LEDS, compared to the same circuit with only one LED? explain your answer.

   

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