Smart Obstacle-Avoiding Robotic Car using Arduino

Designed and built an intelligent robotic car powered by Arduino, featuring a **Bluetooth manual control system paired with an automatic safety override for collision avoidance**.

**System Architecture & Core Logic:**

* **Bluetooth Teleoperation:** Controlled manually in real time via a smartphone app using serial Bluetooth communication (HC-05 / JDY-33).

* **Active Collision Override (Autonomous Safety):** While operating under manual control, the ultrasonic sensor (HC-SR04) continuously scans the path. If an obstacle is detected within a critical threshold, the onboard firmware instantly intercepts manual input, executes an autonomous evasion maneuver, and restores control to the user once the path is clear.

* **Motor Control:** Driven by an L293D motor driver shield to handle bidirectional movement, smooth steering, and responsive emergency braking using PWM signals.

* **Robust Firmware:** Programmed in Embedded C++ using non-blocking state logic to ensure zero-latency Bluetooth polling alongside continuous distance measurement.

**Components & Technologies:** Arduino Uno, L293D Motor Shield, HC-SR04 Ultrasonic Sensor, HC-05 / JDY-33, DC Motors, Embedded C++.