This is code for Arduino for several common experiments that can be done in university level.

1. void setup(){
Serial.begin(9600);
pinMode(A0, INPUT);
}
void loop() {
val = analogRead(A0);
float mv = (val/1024) *5000;
float cel = mv/10;
float far = (cel*9)/5 + 32;
Serial.print("TEMPERATURE = ");
Serial.print(cel);
Serial.print(" degree Celsius or ");
Serial.print(far);
Serial.print(" degree Fahrenheit");
Serial.println();
delay(1000);
}

2. #include<dht.h>
dht DHT;
void setup ()
{
Serial.begin(9600);
pinMode(A0,INPUT);
}
void loop ()
{
DHT.read11(A0);
Serial.print(“ Humidity = “);
Serial.print(DHT.humidity);
Serial.print(“%t”);
Serial.print(“ Temperature = “);
Serial.print(DHT.temperature);
Serial.println();
delay(5000);
}

3. #include<Servo.h>
Servomyservo;
intpotpin=0;
int val;
void setup() {
myservo.attach(9);
}
void loop() {
val = analogRead(potpin);
val = map(val,0,1023,0,180);
myservo.write(val);
delay(10);
}

4. #include <Stepper.h> // Include the header file
// change this to the number of steps on your motor
#define STEPS 32
// create an instance of the stepper class using the steps and pins
Stepper stepper(STEPS,8,10, 9, 11);
int Pval = 0;
int potVal = 0;
void setup() {
Serial.begin(9600);
stepper.setSpeed(200);
}
void loop() {
potVal = analogRead(A0);
potVal = map(potVal,0,1024,0,500);
if (potVal>Pval)
stepper.step(5);
if (potVal<Pval)
stepper.step(-5);
Pval = potVal;
}

5. int motorpin1 = 6;
int motorpin2 = 7;
void setup ()
{
pinMode(motorpin1, OUTPUT);
pinMode(motorpin2, OUTPUT);
}
void loop ()
{
digitalWrite(motorpin1, LOW);
digitalWrite(motorpin2, HIGH);
}

6. int sensorPin =A0;
int sensorValue =0;
void setup ()
{
Serial.begin(9600);
}
void loop ()
{
sensorValue = analogRead(sensorPin);
Serial.println(sensorValue);
delay(1000);
}