Turning our Raspberry Pi car





import RPi.GPIO as gpio
import time

def init():
    gpio.setmode(gpio.BOARD)
    gpio.setup(7, gpio.OUT)
    gpio.setup(11, gpio.OUT)
    gpio.setup(13, gpio.OUT)
    gpio.setup(15, gpio.OUT)

def forward(tf):
    init()
    gpio.output(13, True)
    gpio.output(15, False)
    gpio.output(7, False)
    gpio.output(11, True)
    time.sleep(tf)
    gpio.cleanup()
    
def reverse(tf):
    init()
    gpio.output(13, False)
    gpio.output(15, True)
    gpio.output(7, True)
    gpio.output(11, False)
    time.sleep(tf)
    gpio.cleanup()

def turn_left(tf):
    init()
    gpio.output(7, True)
    gpio.output(11, True)
    gpio.output(13, True)
    gpio.output(15, False)
    time.sleep(tf)
    gpio.cleanup()

def turn_right(tf):
    init()
    gpio.output(7, False)
    gpio.output(13, False)
    gpio.output(15, False)
    gpio.output(11, True)
    time.sleep(tf)
    gpio.cleanup()
	
	
forward(1)
reverse(1)	
turn_left(1)
turn_right(1)
	
		

Now it is time to talk about turning the car, and one more concept. Each time you modify the pins, you need to reset them, or they will retain their last position plus any new changes. For this reason, it's best we instead run the init() function in every function. We're also going to now add turning left and right.


There exists 2 quiz/question(s) for this tutorial. for access to these, video downloads, and no ads.

The next tutorial:






  • Robotics with the Raspberry Pi
  • Programming GPIO example
  • Running GPIO
  • Building Autonomous / RC car intro
  • Supplies needed
  • Motor Control
  • Connecting the four motors
  • Forward and Reverse
  • Turning
  • Pivoting
  • User Control
  • Remotely controlling the car
  • Adding a distance sensor (HC-SR04)
  • Programming with the distance sensor
  • Autopilot and/or auto-correct
  • Autonomous Beginnings
  • Testing Autonomous Code
  • Streaming video example one
  • Less latency streaming option