Embedded Files
Lesson 2
Lesson 2
In this lesson, you'll learn how to make the color of an LED change when a button is pressed.
In this lesson, you'll learn how to make the color of an LED change when a button is pressed.
Before we start, make sure the Arduino is connected to your computer(see homepage is you need help).
Before we start, make sure the Arduino is connected to your computer(see homepage is you need help).
Follow this diagram to make it so when you press the button the light changes color.
Follow this diagram to make it so when you press the button the light changes color.
Any two of the other pins on the LED other than ground can be connected.
Any two of the other pins on the LED other than ground can be connected.
Make sure that the wires are connected to the same pins shown otherwise the code will not turn on the right components.
Make sure that the wires are connected to the same pins shown otherwise the code will not turn on the right components.
Once you do this, copy and paste this code into the Arduino IDE.
Once you do this, copy and paste this code into the Arduino IDE.
void setup () {
pinMode ( 7 , OUTPUT);
pinMode ( 3 , OUTPUT);
pinMode ( 5 , INPUT);
digitalWrite ( 5 , HIGH);
}
void loop () {
// Decides if the button is being pressed or not.
if ( digitalRead ( 5 ) == LOW){
digitalWrite ( 7 , HIGH);
digitalWrite ( 3 , LOW);
} else {
digitalWrite ( 7 , LOW);
digitalWrite ( 3 , HIGH);
}
}
Now, click upload. Make sure the Arduino is plugged into your computer!
Now, click upload. Make sure the Arduino is plugged into your computer!
Now when you press the button, the LED should change color!
Now when you press the button, the LED should change color!
Troubleshooting
Troubleshooting
If the LED isn't changing color:
If the LED isn't changing color:
Make sure the button is connected to ground and pin 5
Make sure the button is connected to ground and pin 5
If the LED isn't lighting up:
If the LED isn't lighting up:
Make sure you have the right connections and the the ground pin is connected to ground.
Make sure you have the right connections and the the ground pin is connected to ground.
Make sure the code doesn't have any errors and that the Arduino is connected to your computer.
Make sure the code doesn't have any errors and that the Arduino is connected to your computer.
If these tips don't work, try to troubleshoot online or contact us.
If these tips don't work, try to troubleshoot online or contact us.
Challenge:
Challenge:
Can you make the LED flash between two colors when the button is pressed?
Can you make the LED flash between two colors when the button is pressed?
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