Raspberry Pi: Time-Controlled Robocar

So another simple and fun project! Here I’ve built a robocar that moves in forward direction for 4 sec and in backward direction for 4 sec.

Demo:

Things Required:

1. Raspberry Pi (I’ve used Raspberry Pi 3)
2. Keyboard
3. Mouse
4. HDMI Screen
5. DC Motor (x4)
6. External Power Supply
7. Jumper wires
8. Car Chassis
9. Wheels(x4)
10. L298N Motor Driver
11. Batteries (1.5V) (x4)
12. Battery holder

Reference Material:

1. The link I followed: (LINK)

Code:

Note that the following code is in python!

View on/Download from Github: (LINK)

import RPi.GPIO as GPIO
from time import sleep

GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)

en1= 2
in1= 3
in2= 4
en2= 14
in3= 15
in4= 18

GPIO.setup(en1, GPIO.OUT)
GPIO.setup(in1, GPIO.OUT)
GPIO.setup(in2, GPIO.OUT)
GPIO.setup(en2, GPIO.OUT)
GPIO.setup(in3, GPIO.OUT)
GPIO.setup(in4, GPIO.OUT)


pwm1= GPIO.PWM(en1, 100)
pwm2= GPIO.PWM(en2, 100)

pwm1.start(0)
pwm2.start(0)


while True:
    GPIO.output(in1, GPIO.LOW)
    GPIO.output(in2, GPIO.HIGH)
    GPIO.output(in3, GPIO.LOW)
    GPIO.output(in4, GPIO.HIGH)
    pwm1.ChangeDutyCycle(50)
    pwm2.ChangeDutyCycle(50)
    sleep(4)
    GPIO.output(in1, GPIO.HIGH)
    GPIO.output(in2, GPIO.LOW)
    GPIO.output(in3, GPIO.HIGH)
    GPIO.output(in4, GPIO.LOW)
    pwm1.ChangeDutyCycle(50)
    pwm2.ChangeDutyCycle(50)
    sleep(4)

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Happy Learning!!