Purpose of this tutorial:
In this tutorial we will flash two LEDs (red and green) with the Arduino board every two seconds.
Necessary components
- Arduino UNO
- 1 LED board red
- 1 LED green
- 2 resistors 220Ω
- connecting wires
Mounting
- Connect the digital pin 0 of the Arduino board to the resistance leg.
- Then, connect the second anode resistance leg (terminal +) of the red LED.
- Connect the red LED cathode (terminal -) to the Arduino GND.
- Connect the digital pin 1 of the Arduino board to the second resistor leg.
- Then, connect the second anode resistance leg (terminal +) of the green LED.
- Finally, the green LED cathode (terminal -) is connected to the Arduino GND.
Program
Here is the program that allows to flash 2 LEDs.
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void setup(){ pinMode(0,OUTPUT); //sets the number 0 digital pin of the Arduino in output mode pinMode(1,OUTPUT); //sets the number 1 digital pin of the Arduino in output mode } void loop(){ digitalWrite(0,HIGH); //red LED lights up digitalWrite(1,LOW); //green LED goes out delay(2000); digitalWrite(0,LOW); //red LED goes out digitalWrite(1,HIGH); //green LED lights up delay(2000); } |
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