Custom Obstacle Avoidance Robot [Code]

Components: 

• Arduino Uno R3 (microcontroller).

• L293D Motor Driver Shield (stacked on the Uno).

• Ultrasonic distance sensor (HC-SR04) on a pan servo.

• Micro servo for panning the ultrasonic sensor (TowerPro SG90).

• Two IR obstacle-avoidance sensors (left/right on the front bumper).

• 3D printed Chassis + 4× TT yellow-gear DC motors + wheels (4WD).