LED Blink

Solving Approach

How do you plan to solve it?

 R= V/I                  (10mA)(1000) = 0.01A

R=5V/0.01A

R=500R
 

Code

void setup() {
  // put your setup code here, to run once:
pinMode(9, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(9, HIGH);
delay(400);

digitalWrite(9, LOW);
delay(800);

}

Output

Video

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Photo of Output

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