Arduino BlueTooth Car
Control your project via bluetooth! In this project, you can control the car using an app available in Android phones in PlayStore. The app name being Bluetooth RC Car. Even if the app isn't available on PlayStore, I'll guide you on how to tweak the code in the new app. This project is the simplest one among all of the 4 wheeled robotic projects, so lets take a deeper dive into it.
Now lets take a look at the components needed to make this project->
When purchasing the lithium-ion battery, keep in mind to purchase a lithium-ion battery holder & A minimum of 2 cells for a recharger
NOTE:
How Does The Project Work?
Once the car is all set up and ready for running, the HC-05 emits radio waves in order to seek connection from a device. Once paired & connected, the data transitted by the phone to HC-05 will be sent to the Arduino. If the data matches Arduino's requirements(which you'll be learning about soon) then a particular function is followed.
The motor driver module aids the Arduino Uno with the power supply to the DC Motors as Arduino cannot do it on its own as it can provide only a max voltage of 5V and 3.3V separately which is useful when it comes to using sensors.
The Circuit Diagram
The Arduino is connected to the L293D Motor driver directly by placing it on top of another just like lego. After which we establish the connection between Arduino & HC-05. Over here you connect the power pins(VCC & GND) and the main communication pins (TXD & RXD). After which we connect the BO Motors then the battery to finish off the project. But we have to make sure that all motors move in the direction we actually want to(because DC motors don't have defined terminals, so we may connect the terminals in the wrong way). In order to check that, just press the Forward button on the app once the car is ready and check which motors are moving in the wrong direction and reverse their polarity.
This code's logic basically makes the HC-05 seek connection. Once the connection has been established, it will read the data being transmitted through the app. If any of it matches with the code lines such as "forward", "backward" etc, the command will be executed. You may need to install the adafruit AFmotor library in the library manager of your Arduino IDE software.
Click here to watch the tutorial & know the connections & codes
Cost Cap Of The Project
The cost may vary from time to time due to inflation or deflation. The price is just an estimate and can also vary according to which manufacturer you're choosing to buy from
This sums up to ₹2280 which is a reasonable amount
for such projects considering you're buying the whole package of Li-ion batteries
Total Cost
Else you could use a power bank at home with a 9V battery(₹70-90)
You just need a power source which could give an output of minimum 1-1.2A and around 8V
