Obstacle Avoiding Smart Car

<h2>Project Overview</h2> <p>A smart car that utilizes an Arduino and ultrasonic sensors to detect and navigate around obstacles. It's a classic robotics project for beginners.</p> <h2>Bill of Materials (BOM)</h2> <ul> <li>Arduino Uno</li> <li>L298N motor driver</li> <li>4 wheels</li> <li>4 TT Gear Motors</li> <li>Servo Motor</li> <li>HC-SR04 Ultrasonic Sensor</li> <li>two 18650 Li-ion batteries with a holder</li> <li>male/female jumper wires</li> <li>an acrylic car chassis</li> <li>and a DC Power Switch.</li> </ul> <h2>Circuit Diagram & Component Arrangement</h2> <p>Follow the wiring diagram below. Each component connects to specific pins on the microcontroller. Use a breadboard for prototyping and ensure all connections are secure before powering on.</p> <p><strong>Wiring Summary:</strong> The HC-SR04 ultrasonic sensor is connected to the Arduino's digital pins to detect obstacles. A servo motor, also connected to the Arduino, pans the sensor. The Arduino processes sensor data and controls the four TT Gear Motors via the L298N H-Bridge motor driver to navigate.</p> <p><a href="https://projecthub.arduino.cc/aakash11/obstacle-avoiding-robot-8018ae">View circuit diagram</a></p> <h2>Step-by-Step Procedure</h2> <ol> <li><strong>Step 1 - Prepare Components:</strong> Gather all components from the BOM. Inspect for damage and verify ratings.</li> <li><strong>Step 2 - Breadboard Layout:</strong> Place the microcontroller on the breadboard. Arrange components for clear wiring paths.</li> <li><strong>Step 3 - Power Connections:</strong> Connect VCC and GND first. Ensure proper polarity for polarized components.</li> <li><strong>Step 4 - Signal Wiring:</strong> Connect sensors and actuators per the wiring table. Double-check pin assignments.</li> <li><strong>Step 5 - Upload Code:</strong> Connect USB, load the sketch, and upload. Verify serial output if applicable.</li> <li><strong>Step 6 - Test & Calibrate:</strong> Power on and test each function. Calibrate sensors if needed.</li> <li><strong>Step 7 - Enclosure (Optional):</strong> Mount in a 3D-printed or custom enclosure for durability.</li> </ol> <h2>Safety Notes</h2> <ul> <li>Always disconnect power before making wiring changes.</li> <li>Use appropriate eye protection when soldering.</li> <li>Adult supervision is required for makers under 16.</li> <li>Do not exceed voltage ratings of components.</li> </ul> <h2>Code & Resources</h2><p><a href="https://projecthub.arduino.cc/aakash11/obstacle-avoiding-robot-8018ae">Download code and schematics</a></p> <h2>Attribution</h2><p>Source: <a href="https://projecthub.arduino.cc/aakash11/obstacle-avoiding-robot-8018ae">https://projecthub.arduino.cc/aakash11/obstacle-avoiding-robot-8018ae</a>. Not specified in context, but content on Arduino Project Hub is typically for personal and educational use.</p>