0 – 9999 counter module using Arduino UNO

Circuit is done as shown in the diagram. Upload the following program to Arduino UNO.

// the setup function runs once when you press reset or power the board
void setup() {
  pinMode(2, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(2, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(100);               // wait for 100 mS
  digitalWrite(2, LOW);    // turn the LED off by making the voltage LOW
  delay(100);               // wait for 100mS
}

Counter will count from 0 – 9999, Count will reset to 0 after 9999.

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