{"id":369,"date":"2025-08-15T02:20:12","date_gmt":"2025-08-15T02:20:12","guid":{"rendered":"http:\/\/www.amartkh.com\/store\/?p=369"},"modified":"2025-08-15T02:22:04","modified_gmt":"2025-08-15T02:22:04","slug":"how-to-make-a-diy-arduino-obstacle-avoiding-car-at-home","status":"publish","type":"post","link":"http:\/\/www.amartkh.com\/store\/2025\/08\/15\/how-to-make-a-diy-arduino-obstacle-avoiding-car-at-home\/","title":{"rendered":"How To Make A DIY Arduino Obstacle Avoiding Car At Home?"},"content":{"rendered":"\n

Alright \u2014 let\u2019s walk through building a DIY Arduino Obstacle Avoiding Car<\/strong> step-by-step.
I\u2019ll give you the parts list<\/strong>, wiring diagram explanation<\/strong>, Arduino code<\/strong>, and how it works<\/strong> so you can make it at home.<\/p>\n\n\n\n

\n\n\n\n

1. Parts You\u2019ll Need<\/strong><\/h2>\n\n\n\n
Component<\/th>Quantity<\/th>Purpose<\/th><\/tr><\/thead>
Arduino UNO (or Nano)<\/td>1<\/td>Main controller<\/td><\/tr>
Ultrasonic Sensor (HC-SR04)<\/td>1<\/td>Distance measurement<\/td><\/tr>
Servo Motor (SG90)<\/td>1<\/td>Rotates the sensor for scanning<\/td><\/tr>
L298N Motor Driver Module<\/td>1<\/td>Controls DC motors<\/td><\/tr>
DC Motors with Wheels<\/td>2\u20134<\/td>Movement<\/td><\/tr>
Caster wheel<\/td>1<\/td>Support<\/td><\/tr>
Chassis (DIY or ready-made)<\/td>1<\/td>Body frame<\/td><\/tr>
Jumper wires<\/td>\u2014<\/td>Connections<\/td><\/tr>
Battery pack (6V\u201312V)<\/td>1<\/td>Power supply<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\n\n\n\n

2. Wiring Connections<\/strong><\/h2>\n\n\n\n

Ultrasonic Sensor (HC-SR04) \u2192 Arduino<\/strong><\/h3>\n\n\n\n
    \n
  • VCC \u2192 5V<\/li>\n\n\n\n
  • GND \u2192 GND<\/li>\n\n\n\n
  • TRIG \u2192 D9<\/li>\n\n\n\n
  • ECHO \u2192 D10<\/li>\n<\/ul>\n\n\n\n

    Servo Motor \u2192 Arduino<\/strong><\/h3>\n\n\n\n
      \n
    • Signal \u2192 D11<\/li>\n\n\n\n
    • VCC \u2192 5V<\/li>\n\n\n\n
    • GND \u2192 GND<\/li>\n<\/ul>\n\n\n\n

      L298N Motor Driver \u2192 Arduino<\/strong><\/h3>\n\n\n\n
        \n
      • IN1 \u2192 D2<\/li>\n\n\n\n
      • IN2 \u2192 D3<\/li>\n\n\n\n
      • IN3 \u2192 D4<\/li>\n\n\n\n
      • IN4 \u2192 D5<\/li>\n\n\n\n
      • ENA \u2192 5V (or PWM pin if speed control)<\/li>\n\n\n\n
      • ENB \u2192 5V<\/li>\n\n\n\n
      • Motor A \u2192 Left motor<\/li>\n\n\n\n
      • Motor B \u2192 Right motor<\/li>\n\n\n\n
      • L298N VCC \u2192 Battery + (6\u201312V)<\/li>\n\n\n\n
      • L298N GND \u2192 Battery \u2013 & Arduino GND<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n
        \"\"\"\"<\/div><\/figure>\n\n\n\n

        3. Arduino Code<\/strong><\/h2>\n\n\n\n
        #include <Servo.h>\n\nServo myServo;\n#define trigPin 9\n#define echoPin 10\n#define servoPin 11\n\n#define IN1 2\n#define IN2 3\n#define IN3 4\n#define IN4 5\n\nlong distance;\nlong duration;\n\nvoid setup() {\n  Serial.begin(9600);\n  myServo.attach(servoPin);\n  \n  pinMode(trigPin, OUTPUT);\n  pinMode(echoPin, INPUT);\n  \n  pinMode(IN1, OUTPUT);\n  pinMode(IN2, OUTPUT);\n  pinMode(IN3, OUTPUT);\n  pinMode(IN4, OUTPUT);\n}\n\nlong getDistance() {\n  digitalWrite(trigPin, LOW);\n  delayMicroseconds(2);\n  digitalWrite(trigPin, HIGH);\n  delayMicroseconds(10);\n  digitalWrite(trigPin, LOW);\n  duration = pulseIn(echoPin, HIGH);\n  return duration * 0.034 \/ 2; \/\/ Convert to cm\n}\n\nvoid forward() {\n  digitalWrite(IN1, HIGH);\n  digitalWrite(IN2, LOW);\n  digitalWrite(IN3, HIGH);\n  digitalWrite(IN4, LOW);\n}\n\nvoid backward() {\n  digitalWrite(IN1, LOW);\n  digitalWrite(IN2, HIGH);\n  digitalWrite(IN3, LOW);\n  digitalWrite(IN4, HIGH);\n}\n\nvoid left() {\n  digitalWrite(IN1, LOW);\n  digitalWrite(IN2, HIGH);\n  digitalWrite(IN3, HIGH);\n  digitalWrite(IN4, LOW);\n}\n\nvoid right() {\n  digitalWrite(IN1, HIGH);\n  digitalWrite(IN2, LOW);\n  digitalWrite(IN3, LOW);\n  digitalWrite(IN4, HIGH);\n}\n\nvoid stopCar() {\n  digitalWrite(IN1, LOW);\n  digitalWrite(IN2, LOW);\n  digitalWrite(IN3, LOW);\n  digitalWrite(IN4, LOW);\n}\n\nvoid loop() {\n  myServo.write(90); \/\/ Forward facing\n  delay(200);\n  distance = getDistance();\n  \n  if (distance > 20) {\n    forward();\n  } else {\n    stopCar();\n    delay(300);\n    \n    myServo.write(0); \/\/ Scan left\n    delay(500);\n    long leftDist = getDistance();\n    \n    myServo.write(180); \/\/ Scan right\n    delay(500);\n    long rightDist = getDistance();\n    \n    myServo.write(90); \/\/ Reset center\n    \n    if (leftDist > rightDist) {\n      left();\n      delay(500);\n    } else {\n      right();\n      delay(500);\n    }\n  }\n}\n<\/code><\/pre>\n\n\n\n
        \n\n\n\n
        4. How It Works<\/strong><\/h2>\n\n\n\n
          \n
        1. The servo motor<\/strong> rotates the ultrasonic sensor<\/strong> to scan front, left, and right.<\/li>\n\n\n\n
        2. The Arduino<\/strong> measures distances using the HC-SR04<\/strong> sensor.<\/li>\n\n\n\n
        3. If the path is clear, the car moves forward<\/strong>.<\/li>\n\n\n\n
        4. If there\u2019s an obstacle, it stops<\/strong>, looks left<\/strong> and right<\/strong>, then chooses the side with more space.<\/li>\n\n\n\n
        5. Motor driver<\/strong> powers the DC motors based on Arduino signals.<\/li>\n<\/ol>\n\n\n\n
          \n\n\n\n
          5. Tips<\/strong><\/h2>\n\n\n\n
            \n
          • Use a rechargeable Li-ion battery<\/strong> for better performance.<\/li>\n\n\n\n
          • Reduce servo movement delays<\/strong> for faster reaction.<\/li>\n\n\n\n
          • Add LEDs to indicate movement direction for fun.<\/li>\n<\/ul>\n\n\n\n
            \n\n\n\n
            <\/p>\n","protected":false},"excerpt":{"rendered":"
            Alright \u2014 let\u2019s walk through building a DIY Arduino Obstacle Avoiding Car step-by-step.I\u2019ll give you the parts list, wiring diagram explanation, Arduino code, and how it works so you can make it at home. 1.…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1],"tags":[],"class_list":["post-369","post","type-post","status-publish","format-standard","hentry","category-projects"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/www.amartkh.com\/store\/wp-json\/wp\/v2\/posts\/369","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.amartkh.com\/store\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.amartkh.com\/store\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.amartkh.com\/store\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.amartkh.com\/store\/wp-json\/wp\/v2\/comments?post=369"}],"version-history":[{"count":2,"href":"http:\/\/www.amartkh.com\/store\/wp-json\/wp\/v2\/posts\/369\/revisions"}],"predecessor-version":[{"id":372,"href":"http:\/\/www.amartkh.com\/store\/wp-json\/wp\/v2\/posts\/369\/revisions\/372"}],"wp:attachment":[{"href":"http:\/\/www.amartkh.com\/store\/wp-json\/wp\/v2\/media?parent=369"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.amartkh.com\/store\/wp-json\/wp\/v2\/categories?post=369"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.amartkh.com\/store\/wp-json\/wp\/v2\/tags?post=369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}