Skip to main content

48. Obstacle Avoiding Car using Arduino

Hey everyone!
I am sorry that I have not posted in a while. Today I will be teaching you about making an obstacle avoiding car using Arduino. Read on further to learn about the hardware components used in this project, the connections, and coding.

Hardware Components used in this Project

  • Arduino Uno
  • USB Type A/ B cable (for Arduino Uno)
  • Robot chassis - 2WD beginner
  • Micro servo motor SG-90
  • Ultrasonic sensor (HC-SR04)
  • L298N Motor driver
  • Gear motor 5V (x2)
  • LEDs (x4) - Red (x2) and Orange (x2)
  • Resistor - 220 Ω
  • Cardboard bracket
  • Battery (x2) - 9V
  • Rocker Switch
  • Male-to-Female Jumper wires (x12) - 20 cm
  • Male-to-Male Jumper wires (x5) - 10cm

Tools and other essentials

  • Mini Flat head screwdriver
  • Double sided tape

Setup


Your Arduino car must look somewhat similar to this.

Connections

L298N Motor driver

  • IN1 - D7
  • IN2 - D6
  • IN3 - D5
  • IN4 - D4
  • OUT1 - Right (+)
  • OUT2 - Right (-)
  • OUT3 - Left (-)
  • OUT4 - Left (+)

Micro servo motor SG-90

  • S (Yellow/ Orange) - D9
  • (+) (Red) - 5V
  • (-) (Black/ Brown) - Ground (GND)

Ultrasonic sensor HC-SR04

  • VCC - 5V
  • Trig - D2
  • Echo - D3
  • GND - Ground

LEDs

  • Red01 - D11
  • Red02 - D12
  • Orange (Left) - A0
  • Orange (Right) - A1

Coding

Before moving on to coding, there are some important points to consider. Make sure your L298N motor driver is connected to the Arduino microcontroller board in the same way as mentioned in the 'Connections' section. 
  • IN1 - Backward motion of the right motor
  • IN2 -  Forward motion of the right motor
  • IN3 - Backward motion of the left motor
  • IN4 - Forward motion of the left motor
For this project, you will be needing the 'Servo' library by Michael Margolis and 'NewPing' library by Tim Eckel. Create global variables for the L298N pins and ultrasonic sensor pins. Create a global variable named 'Maximum distance' and assign it to 200. Create a Servo object, and use the NewPing sonar function and the parameters are the variables for the trig pin and echo pin along with the maximum distance variable. 
Within void setup( ) function, use pinMode( ) to declare the L298N pins, Trig pin and LED pins as OUTPUT, and Echo pin as INPUT. Use attach( ) function to define the pin in which the servo motor is attached to. Use write( ) function to set the servo motor's position at 90°, and after a delay of 2 seconds, the distance must be measured.
Within void loop( ), create two local variable named 'Rdistance' and 'Ldistance'. If the distance measured is within 15 cm, the car must stop, reverse and then stop. The servo motor must be set at 10° to look to the right and 170° to look to the left. If the distance measured is greater than the distance from the left, the car must move to the right and vice versa. Before completing the void loop( ) function, the distance must be measured.
  • Stop - Both red LEDs must be set HIGH
  • Reverse - Both orange LEDs must be set HIGH
  • Turn right - The right Orange LED must be set HIGH
  • Turn left - The left Orange LED must be set HIGH
If anyone has any questions with the coding, please feel free to comment below or send me an email at arduinoprojectsbyr@gmail.com.

Final Look

If anyone has any questions, or suggestions, about this project, please don't hesitate to comment below or send me an email at arduinoprojectsbyr@gmail.com.

Comments

Post a Comment

Popular posts from this blog

85. Analog and Digital Clock on Adafruit TFT Display using Arduino

 Hey everyone, Sorry I have not posted in a while. Today, I will be presenting you my Analog and Digital Clock on Adafruit TFT Display using Arduino. You can find the schematic and code explanation within this post. Read on further to learn how I did this project. Hardware components used in this project Arduino Mega 2560 Adafruit 2.8" TFT Touch Shield for Arduino w/ Capacitive Touch - You could also use any other Arduino compatible TFT display DS1307 RTC Module Solderless Breadboard - Half+ (This is optional if you are connecting the RTC module to the development board directly) Jumper wires (x4) - Male/Male jumper wires if using solderless breadboard. Female/Male if connecting RTC module directly to Arduino Mega. Software apps Arduino IDE - latest version is recommended Setup Connections DS1307 RTC Module SCL - A5 SDA - A4 VCC - 5V GND - Ground Adafruit TFT Touch shield You can simply place the Adafruit TFT Touch shield onto your Arduino Mega 2560 development board. Make sure to...
Post a Comment
Read more

77. Controlling Micro servo Robotic Arm with MPU-6050 sensor module

 Hey everyone! I am back with an interesting project. Today, you will be learning about controlling a Simple 2 axis Robotic Arm, made from Micro servo motors, with an MPU-6050 sensor module. Please feel free to visit my previous blog post to learn about the MPU-6050 sensor module. Hardware components used in this project Arduino Mega 2560 - You could use any other Arduino microcontroller, but make sure you use an external power supply. USB Type A/B cable (for Arduino Mega 2560) MPU-6050 sensor module SG-90 Tower Pro Micro Servo motor (x2) Male-to-Male Jumper wires (x6) Male-to-Female Jumper wires (x5) Setup Schematic MPU-6050 sensor module VCC - 3.3V GND - Ground SDA - D20 (Arduino Mega 2560), A4 (Arduino Uno and Nano) SCL - D21 (Arduino Mega 2560), A5 (Arduino Uno and Nano) INT - D2 Micro servo motor (Roll) S (Yellow/ Orange) - D9 + (Red) - 5V - (Black/ Brown) - GND  Micro servo motor (Pitch) S (Yellow/ Orange) - D10 + (Red) - 5V - (Black/ Brown) - GND Coding As I alread...
Post a Comment
Read more

70. Arduino Stopwatch and Timer

Hello everyone! Today I am going to explain you about making an Arduino Stopwatch and Timer, which can be used for time based projects. Read on further to learn more about this project. Hardware components used in this project Arduino Uno USB Type A/ B cable Solderless Breadboard - Full+ LCD display module with I2C interface - 16x2 Potentiometer - 10K Push-buttons (x5) Active Buzzer module (KY-012) LED - Red Resistors (x6) - 10kΩ (x5) and 220Ω (x1) Male-to-Male Jumper wires - 10cm and 20cm Jumpers - to reduce the usage of wires Hardware setup Connections 10K Potentiometer S - A0 (+) - 5V (-) - Ground (GND) Active Buzzer module S - D7 (+) - 5V (-) - Ground (GND) 16x2 LCD display module with I2C interface GND - Ground VCC - 5V SDA - A4 SCL - A5 Push-buttons (+) - 5V (-) - Ground (GND) S - D2, D3, D4, D5, D6 Coding Now, I will explain you about how this real-time project works and you can figure out the coding by this idea.  Push-buttons and their functions D2 - Set Countdown timer D3...
Post a Comment
Read more