Controlling an RC car with Arduino

With Arduino, you can make your own RC car (radio-controlled car) and control it in various ways. Representative examples include Bluetooth, infrared (IR), and wireless transmitters and receivers, and you can use various input devices such as smartphone apps, joysticks, and remote controls.

 

 1. Basic components

   • Arduino board (Uno, Nano, etc.)

   • DC motor or servo motor (for driving the body)

   • Motor driver (L298N, L293D, etc.)

   • Wireless communication module (HC-05/HC-06 Bluetooth, HM-10 BLE, NRF24L01, IR receiver, etc.)

   • Power supply (battery)

   • Body (chassis), wheels, and other parts

 

 2. Basic operating principle

   1. Input signal reception

     o Receives signals from smartphones, joysticks, remote controls, etc. and transmits them to Arduino.

   2. Signal Interpretation in Arduino

     o Analyze the received signal to decide what action to perform (forward, backward, turn left, turn right, etc.)

   3. Motor Control

     o Apply voltage to the DC motor through the motor driver to rotate the wheel in the desired direction and speed

 

  production example (Bluetooth adjustment)

  1. Circuit connection

  o Connect Arduino, motor driver, DC motor, and Bluetooth module (HC-05, etc.).

  2. Write code

  o Write code to receive signals via Bluetooth serial communication and control the motor according to the signals.

  3. Prepare app or joystick

  o Set up a smartphone app (e.g. Bluetooth Serial Controller) to transmit signals such as 'F' (forward), 'B' (backward), 'L' (turn left), and 'R' (turn right) when pressing a button.

  4. Run and test

  o Assemble all parts and send commands from the app to check if the RC car moves normally.