Arduino GPIO LED Blink

Solving Approach

How do you plan to solve it?

 Steps:

1. First, calculate the value of the resistor.
2. Then, build the circuit.
3. Finally, write code to turn the LED on and off at a given time interval.

To calculate the resistor value:

1. The voltage drop across the LED is 1.8V, and the supply voltage is 5V.
2. The desired current through the LED is 10mA.

So,

R  = 5V−1.8V /10mA

     =  3.2V / 0.01A

     = 320 Ω

Code

/*Paste your code here*/
void setup(){
  pinMode(13, OUTPUT);
}
void loop(){
  digitalWrite(13,HIGH);
  delay(400);
  digitalWrite(13,LOW);
  delay(800);
}

Output

Video

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Photo of Output

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