How to Make a HC-SR04 Obstacle Avoiding Robot With Arduino

About: I am a student in high school who loves robotics. I am great with Arduino and can code Java and C + +

In this Instructable today, you will be shown how to make a Obstacle Avoiding Robot with a few cheap parts and a free open-source software coding platform IDE called Arduino. This is a great robotics project and is very easy to make. After you are finished, you can let it free and see what it can do!

Step 1: Parts Needed

Listed below are all the parts needed to build this. I have provided links if you need to buy them from Amazon

Step 2: Connections

Now it's time to connect these parts you have collected and make this robot. Refer to my schematic for all the connections.

--For the motors, the orientation in which you place them will make a difference so plug them in and if after finishing, it doesn't go forward, try switching them.--

The ultrasonic sensor needs to spin with the servo motor so you either need to buy a ultrasonic bracket or use 2 pieces of cardboard to make one.

The 9V battery going to the L298N H-Bridge needs to be a 4 AA Battery Holder unless you can get the 9V battery to have 2 separate wires.

Step 3: Code

Now you need this machine you built to do something. We will achieve that using Arduino. If you already haven't done so, download Arduino IDE from this website - https://www.arduino.cc/en/Main/Software

After you do that, watch this video if you don't know how to upload a library to Arduino.

The video will also show you how to download the NewPing Library, to which the link is here. This is needed for the code to work. https://goo.gl/Qe6XU6

The code is here.

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