i want to add arduino codes in your repo

Arduino/DistanceCalculator/DistanceCalculator.ino

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+const int trigPin = 9;
+const int echoPin = 8;
+// defines variables
+long duration;
+int distance;
+void setup() {
+pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
+pinMode(echoPin, INPUT); // Sets the echoPin as an Input
+Serial.begin(9600); // Starts the serial communication
+}
+void loop() {
+// Clears the trigPin
+digitalWrite(trigPin, LOW);
+delayMicroseconds(2);
+// Sets the trigPin on HIGH state for 10 micro seconds
+digitalWrite(trigPin, HIGH);
+delayMicroseconds(10);
+digitalWrite(trigPin, LOW);
+// Reads the echoPin, returns the sound wave travel time in microseconds
+duration = pulseIn(echoPin, HIGH);
+// Calculating the distance
+distance= duration*0.034/2;
+// Prints the distance on the Serial Monitor
+Serial.print("Distance: ");
+Serial.println(distance);
+delay(200);
+}

Arduino/OhmMeter.ino

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+int v=5;
+float r1=10000;
+float r2=0.0f;
+float input=0.0f;
+
+void setup() {
+  Serial.begin(9600);
+  pinMode(A0,INPUT);
+}
+
+void loop() {
+  int sensorValue = analogRead(A0);
+  float voltage = sensorValue * (v / 1023.0);
+  r2=r1*(voltage/(v-voltage));
+  Serial.println(r2);
+  delay(100);
+}

Arduino/Smart street light.ino

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+int ir1=2;
+int ir2=3;
+int ir3=4;
+int ir4=5;
+
+int led1=6;
+int led2=7;
+int led3=8;
+int led4=9;
+int led5=10;
+int led6=11;
+
+int proxy1=0;
+int proxy2=0;
+int proxy3=0;
+int proxy4=0;
+void setup() 
+{
+  pinMode(ir1,INPUT);
+  pinMode(ir2,INPUT);
+  pinMode(ir3,INPUT);
+  pinMode(ir4,INPUT);
+
+  pinMode(led1,OUTPUT);
+  pinMode(led2,OUTPUT);
+  pinMode(led3,OUTPUT);
+  pinMode(led4,OUTPUT);
+  pinMode(led5,OUTPUT);
+  pinMode(led6,OUTPUT);
+}
+
+
+void loop(){
+  proxy1=digitalRead(ir1);
+  proxy2=digitalRead(ir2);
+  proxy3=digitalRead(ir3);
+  proxy4=digitalRead(ir4);
+
+if(proxy1==HIGH)
+{
+  digitalWrite(led1,HIGH);
+  digitalWrite(led2,HIGH);
+  delay(20);
+}
+else
+{
+  digitalWrite(led1,LOW);
+  digitalWrite(led2,LOW);
+}
+
+if(proxy2==HIGH)
+{
+  digitalWrite(led2,HIGH);
+  digitalWrite(led3,HIGH);
+    delay(20);
+}
+else
+{
+  digitalWrite(led2,LOW);
+  digitalWrite(led3,LOW);
+
+}
+
+if(proxy3==HIGH)
+{
+  digitalWrite(led3,HIGH);
+  digitalWrite(led4,HIGH);
+    delay(20);
+}
+else
+{
+  digitalWrite(led3,LOW);
+  digitalWrite(led4,LOW);
+  digitalWrite(led5,LOW);
+}
+
+if(proxy4==HIGH)
+{
+  digitalWrite(led4,HIGH);
+  digitalWrite(led5,HIGH);
+  digitalWrite(led6,HIGH);
+  delay(20);
+}
+else
+{
+  digitalWrite(led4,LOW);
+  digitalWrite(led5,LOW);
+  digitalWrite(led6,LOW);
+}
+  } 
+
+
+  else{
+    digitalWrite(led1,LOW);
+    digitalWrite(led2,LOW);
+    digitalWrite(led3,LOW);
+    digitalWrite(led4,LOW);
+    digitalWrite(led5,LOW);
+    digitalWrite(led6,LOW);
+}
+}

Arduino/Smart_dustbin_arduino.ino

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+#include <Servo.h>   //servo library
+Servo servo;     
+int trigPin = 5;    
+int echoPin = 6;   
+int servoPin = 7;
+int led= 10;
+long duration, dist, average;   
+long aver[3];   //array for average
+
+
+void setup() {       
+    Serial.begin(9600);
+    servo.attach(servoPin);  
+    pinMode(trigPin, OUTPUT);  
+    pinMode(echoPin, INPUT);  
+    servo.write(0);         //close cap on power on
+    delay(100);
+    servo.detach(); 
+} 
+
+void measure() {  
+ digitalWrite(10,HIGH);
+digitalWrite(trigPin, LOW);
+delayMicroseconds(5);
+digitalWrite(trigPin, HIGH);
+delayMicroseconds(15);
+digitalWrite(trigPin, LOW);
+pinMode(echoPin, INPUT);
+duration = pulseIn(echoPin, HIGH);
+dist = (duration/2) / 29.1;    //obtain distance
+}
+void loop() { 
+  for (int i=0;i<=2;i++) {   //average distance
+    measure();               
+   aver[i]=dist;            
+    delay(10);              //delay between measurements
+  }
+ dist=(aver[0]+aver[1]+aver[2])/3;    
+
+if ( dist<50 ) {
+//Change distance as per your need
+ servo.attach(servoPin);
+  delay(1);
+ servo.write(0);  
+ delay(3000);       
+ servo.write(150);    
+ delay(1000);
+ servo.detach();      
+}
+Serial.print(dist);
+}

Arduino/two_wheel_motor_robot.ino

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+// This Robot/car generally has two wheels with motors at the back and 1 castor wheel in front working with L298n motor driver
+// This robot code is basic for non-encoder motors(means we are not counting steps) , just moving the car using delay   
+//*****************************************************//
+// IMPORTANT POINTS:
+    // mot1 , mot1b are direction pins means if LOW and HIGH move motor left forward then HIGH and LOW move backward.  PS--According to circuit connections
+    // mot2 , mot2b are direction pins means if LOW and HIGH move motor right forward then HIGH and LOW move backward.  PS--According to circuit connections
+    //mot1_pwm is speed of left motor 
+    // mot2_pwm is speed of right motor
+    // You also need to check when the right turn aur circle path is completing, means in how many seconds. and set that time as delay.
+    //It depends on motor rpm, battery voltage etc.
+//******************************************************//
+
+
+// put below pin numbers according to your cicuit
+int mot1_pwm=5;   // left motor speedpwm pin number
+int mot1=4;      //left motor direction 1
+int mot1b=3;    //left motor direction 2
+
+int mot2_pwm=6;    // right motor speedpwm pin number
+int mot2=7;       //right motor direction 1
+int mot2b=8;      //right  motor direction 2
+
+
+void setup() {
+  // putting all pins mode as output
+  pinMode(mot1,OUTPUT);
+  pinMode(mot1b,OUTPUT);
+    pinMode(mot1_pwm,OUTPUT);
+
+  pinMode(mot2_pwm,OUTPUT);
+  pinMode(mot2,OUTPUT);
+  pinMode(mot2b,OUTPUT);
+
+
+// initialize motors pwm as zero to stop in initial
+  digitalWrite(mot1,LOW);
+  digitalWrite(mot1b,LOW);
+  analogWrite(mot1_pwm,0);
+
+  digitalWrite(mot2,LOW);
+  digitalWrite(mot2b,LOW);
+  analogWrite(mot2_pwm,0);
+
+
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+
+    // there are many other ways also to make your bot turn left or right. Below is one of the way.
+
+    // calling the above functions to move the bot
+
+    move_forward();
+    delay(6000);  // move forward for 6 seconds
+
+    move_backward();
+    delay(6000);  // move backward for 6 seconds
+
+     stop_car();
+    delay(2000); // stop the bot for 2 seconds
+
+     left_turn();  //bot will rotate on left side on its position 
+    delay(2000);    // this will starts rotating it for 2 seconds
+    right_turn();  //bot will rotate on right side on its position
+    delay(2000);
+
+    circle_clockwise();
+    delay(9000);  // moving clockwise in circular path for 9 seconds
+    circle_anticlockwise();
+    delay(9000);  // moving anticlockwise in circular path for 9 seconds
+
+    stop_car();
+    delay(2000); // stop the bot for 2 seconds
+
+
+    // similarly we can write any path using above functions
+
+}
+
+// Functions for the movement of car/robot
+
+int stop_car()
+{
+  digitalWrite(mot1,LOW);
+  digitalWrite(mot1b,HIGH);
+  analogWrite(mot1_pwm,0);
+
+  digitalWrite(mot2,LOW);
+  digitalWrite(mot2b,HIGH);
+  analogWrite(mot2_pwm,0);
+
+  }
+int move_forward()
+{
+  digitalWrite(mot1,LOW);
+  digitalWrite(mot1b,HIGH);
+  analogWrite(mot1_pwm,250);
+
+  digitalWrite(mot2,LOW);
+  digitalWrite(mot2b,HIGH);
+  analogWrite(mot2_pwm,250);
+
+  }
+int move_backward()
+{
+  digitalWrite(mot1,HIGH);
+  digitalWrite(mot1b,LOW);
+  analogWrite(mot1_pwm,250);
+
+  digitalWrite(mot2,HIGH);
+  digitalWrite(mot2b,LOW);
+  analogWrite(mot2_pwm,250);
+
+  }
+ int circle_clockwise()
+  {
+
+  digitalWrite(mot1,LOW);
+  digitalWrite(mot1b,HIGH);
+  analogWrite(mot1_pwm,250);
+
+  digitalWrite(mot2,LOW);
+  digitalWrite(mot2b,HIGH);
+  analogWrite(mot2_pwm,100);
+
+    }
+
+ int circle_anticlockwise()
+  {
+
+  digitalWrite(mot1,LOW);
+  digitalWrite(mot1b,HIGH);
+  analogWrite(mot1_pwm,100);
+
+  digitalWrite(mot2,LOW);
+  digitalWrite(mot2b,HIGH);
+  analogWrite(mot2_pwm,250);
+
+    }
+
+int left_turn()
+  {
+
+  digitalWrite(mot1,LOW);
+  digitalWrite(mot1b,HIGH);
+  analogWrite(mot1_pwm,0);
+
+  digitalWrite(mot2,LOW);
+  digitalWrite(mot2b,HIGH);
+  analogWrite(mot2_pwm,250);
+
+    }
+int right_turn()
+ {
+
+  digitalWrite(mot1,LOW);
+  digitalWrite(mot1b,HIGH);
+  analogWrite(mot1_pwm,250);
+
+  digitalWrite(mot2,LOW);
+  digitalWrite(mot2b,HIGH);
+  analogWrite(mot2_pwm,0);
+
+    }