Bluetooth Controlled Car

Jumper wires (generic)

Arduino IDE

L293D Motor Drive Shield for Arduino Uno

HC-05 Bluetooth Module

12 V 200 rpm DC Motor

Breadboard (generic)

Arduino UNO

Hello there!Anything that can be controlled is great. Isn't it? We humans love controlling stuff and that is why automation and robotics so fascinating. This tutorial will teach you how to create your own Bluetooth controlled car. So lets get started.This will be a Bluetooth controlled car so for this project we will be using HC-05 Bluetooth module to receive the controlling data packets.We will also need an android app which will be sending the controlling data packets to the Bluetooth module. We will use a third party application (<a href="https://play.google.com/store/apps/details?id=com.broxcode.arduinobluetoothfree&hl=en">click here </a>to download) for this purpose.<ul ><li >-> Okay folks! Let's build the hardware.</li><li >-> Body of the car.</li></ul>The car which we are building for this project will be a dual motor car. I used two 12 v 200 rpm DC motors. You can use a ready made chassis. I used a PVC sheet as chassis.<div id="gallery"><img id="gallery" src=https://projects.arduinocontent.cc/598a5aa3-81e2-4a22-ac7e-d34115df4610.jpg /><figcaption> </figcaption><img id="gallery" src=https://projects.arduinocontent.cc/76b112ee-b5ce-4ab3-aafb-b1d7abfb52a6.jpg /><figcaption> </figcaption></div>Thus the basic structure of our car is ready. You can use this design or you can develop your very own design but remember keep the weight as low as possible as this is a two motor design.<h3 >--> Circuit</h3>Now let us build the circuit<div id="gallery"><img id="gallery" src=https://projects.arduinocontent.cc/3539f47a-7db0-4964-b1e7-af7588460c9c.jpg /><figcaption>Connections</figcaption><img id="gallery" src=https://projects.arduinocontent.cc/f5bc75bf-5ddd-4105-b252-6db0e896334d.jpg /><figcaption> </figcaption><img id="gallery" src=https://projects.arduinocontent.cc/ec9725fd-fb38-42f2-874c-c33a02c2f1da.jpg /><figcaption> </figcaption></div>Follow the schematic to make the connections. This is how it will look after all connections are made.<h3 >--> Power supply</h3>Now this is a bit crucial.For powering the Arduino Uno is used a power bank with 5v output voltage. This is not enough to drive those 12v dc motors. So we need an addition power source.I used two 9v batteries in series to get 18v supply. The major problem here was that here a good amount of current was also required. My batteries were not able to supply sufficient current and so the performance of this car was not 100% satisfactory. It was working but the motors ran at very low speed.So I recommend to use a 12v battery or else you would have to compromise with the speed.<h3 >-->Code</h3>Here we will use the direction of rotation of motors to control the direction of the car.Forward - Both motors move in forward directionBackward - Both motors move in backward directionLeft - Left motor moves backwards and right motor moves ForwardRight - Left motor moves forwards and right motor moves backwardStop - Both motors stop<pre ><code > void forward() { motor1.run(FORWARD); motor2.run(FORWARD); } void backward() { motor1.run(BACKWARD); motor2.run(BACKWARD); } void left() { motor1.run(BACKWARD); motor2.run(FORWARD); } void right() { motor1.run(FORWARD); motor2.run(BACKWARD); } void Stop() { motor1.run(RELEASE); motor2.run(RELEASE); } </code></pre>--------------------------------------------------------------------------------------So that was it!1. Just upload the code on to the Arduino.2. Make the connections.3. Launch the app.4. Connect your phone to the car.<h3 >Here is our finished BEAUTY!</h3><div id="gallery"><img id="gallery" src=https://projects.arduinocontent.cc/881c27eb-1515-4292-aec4-c45a4fab91d2.jpg /><figcaption> </figcaption><img id="gallery" src=https://projects.arduinocontent.cc/00c39640-f1d7-4d13-851e-7c11a6cd44e2.jpg /><figcaption> </figcaption><img id="gallery" src=https://projects.arduinocontent.cc/58dd9be5-0100-4b7b-abec-65724d22793b.jpg /><figcaption> </figcaption><img id="gallery" src=https://projects.arduinocontent.cc/b191f012-6ba0-4ca9-87d7-1012c61d31b8.jpg /><figcaption> </figcaption><img id="gallery" src=https://projects.arduinocontent.cc/9d5c3928-ec76-4ef6-9068-86b024f7df82.jpg /><figcaption> </figcaption></div>I hope this tutorial was good enough to get you going. If you got any suggestions for some changes or further addition to this project then please let me know in the comment section.

The circuit

The code

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