Overview / Usage

I was inspired by a couple of projects online using Ultrasonic sensor HR-SRO4. I want to build an obstacle detection module for autonomous robots. This will be attached to the robot, and it will direct the robot to avoid obstacles. It could also be attached to static objects just to monitor the presence of any other object within its range, and possibly how many objects are there.
It consists of an Ultrasonic ranger HC-SR04, a servo which carries the ranger and rotates it around, and an Arduino Uno board.
Right now it can detect an obstacle and the location relative to the radar unit. I plan to work on being able to tell how many objects are there, and how to avoid the obstacle.