The document describes several Arduino sketches. The first sketch uses an array of pin numbers to light up LEDs in sequence using a for loop. The second sketch uses an LM35 sensor to read temperature values from analog pin A0 and print them to the serial monitor. The third sketch stores the on/off patterns for the segments of a 7-segment display in an array and uses it to display counting from 10 to 0 on the display. The fourth sketch reads an analog temperature sensor value and writes it simultaneously to three PWM pins to control the brightness of three LEDs based on the temperature.

1. DIN 3

3.  int timer = 100;  void loop() {
 int ledPins[] = {  for (int thisPin = 0; thisPin <
 11, 12, 13, 6, 5, 3 }; pinCount; thisPin++) {
 int pinCount = 6;  digitalWrite(ledPins[thisPin],
 void setup() { HIGH);
 int thisPin;  delay(timer);
 for (int thisPin = 0; thisPin <  digitalWrite(ledPins[thisPin],
pinCount; thisPin++) { LOW);
 pinMode(ledPins[thisPin],  }
OUTPUT);  for (int thisPin = pinCount - 1;
 } thisPin >= 0; thisPin--) {
 } 
 digitalWrite(ledPins[thisPin],
HIGH);
 delay(timer);
 digitalWrite(ledPins[thisPin],
LOW);
 }
 }

4.  LM
35 IS USE TO MEASURE TO
TEMPERATURE OF SYSTEM.

7.  void setup() {
 Serial.begin(9600);
}
 voidloop() {
 int sensorValue =
analogRead(A0);

Serial.println(sensorV
alue, DEC);
}

11.  void setup() {
  pinMode(2, OUTPUT);
 pinMode(3, OUTPUT);
 // Arduino pin: 2,3,4,5,6,7,8  pinMode(4, OUTPUT);
 byte seven_seg_digits[10][7] = { {  pinMode(5, OUTPUT);
1,1,1,1,1,1,0 }, // = 0  pinMode(6, OUTPUT);
 { 0,1,1,0,0,0,0 }, // = 1  pinMode(7, OUTPUT);
 { 1,1,0,1,1,0,1 }, // = 2  pinMode(8, OUTPUT);
 { 1,1,1,1,0,0,1 }, // = 3  pinMode(9, OUTPUT);
 { 0,1,1,0,0,1,1 }, // = 4  writeDot(0); // start with the "dot" off
 { 1,0,1,1,0,1,1 }, // = 5  }
 { 1,0,1,1,1,1,1 }, // = 6
 { 1,1,1,0,0,0,0 }, // = 7  void writeDot(byte dot) {
 { 1,1,1,1,1,1,1 }, // = 8  digitalWrite(9, dot);
 { 1,1,1,0,0,1,1 } // = 9  }
 };


12.  Void
sevenSegWrite(byte  void loop() {
digit) {  for (byte count = 10;
 byte pin = 2; count > 0; --count) {
 for (byte segCount = 0;  delay(1000);
segCount < 7;  sevenSegWrite(count
++segCount) { - 1);
 digitalWrite(pin,  }
seven_seg_digits[digit][  delay(4000);
segCount]); }
 ++pin;
 }
}

14.  int sec1=3; void loop()
 int sec2=5; {
 int sec3=6;  sa =
 int temp=A0; analogRead(temp);
 int sem;  {
 int sa;  analogWrite(3,sa);
 void setup()  analogWrite(5,sa);
{  analogWrite(6,sa);
 pinMode(3, OUTPUT); }
 pinMode(5, OUTPUT); }
 pinMode(6, OUTPUT);
}