Obstacle Avoiding Robot using Arduino

Components Details () {
Arduino Uno,
4 wheel robot car kit,
sg90 servo motor,
L293D motor control shield,
Ultrasonic Sensor Holder,
ultrasonic sensor hc-sr04,
Female to Female jumper Wires,
18650 Battery Holder – 2 Cell ,
18650 Battery Cell 3.7V x 2
}