Introduction: Raspberry Pi Control Remote Toy Car

By Murphy Poon

Raspberry Pi Control Remote Toy Car

Hardware :

1 . Raspberry Pi B+ or Higher

2. (4) 2N3904 NPN (EBC) Q6

3. (8) 10K Resisters

4. (4) 1K Resisters

5 (4) LED Light (Any Color)

How to Make ?

See above Photos

Pin Connect
Raspberry Pi -- Control Circuit -- Remote

GPIO 17 -- Circuit A -- LEFT

GPIO 27 -- Circuit B -- RIGHT

GPIO 22 -- Circuit C -- Forward

GPIO 23-- Circuit D -- Backward

Simple Python Test
This simple test is to control GPIO 4 ON and OFF, you have to connect to Forward Pin on Toy Car Remote before RUN

$ sudo nano simpletest.py

<pre><p><strong>import</strong> time</p><p><strong>import</strong> RPi.GPIO <strong>as</strong> io</p><p>io.setmode(io.BOARD)</p><p>pir_pin = 7</p><p>io.setup(pir_pin, io.OUT)</p><p><strong>while</strong> True:</p><p>    io.output(pir_pin, io.HIGH)</p><p>    <strong>print</strong>(<strong>"Forward On"</strong>)</p><p>    time.sleep(3)</p><p>      io.output(pir_pin, io.LOW)</p><p>    <strong>print</strong>(<strong>"Forward OFF"</strong>)</p><p>      time.sleep(3)</p>

Complete Script

$sudo nano toycarremote.py

<p>import time <br>import RPi.GPIO as gpio </p><p>class ToyCarRemote:
  
    def __init__(self, forward_pin=11, backward_pin=13, left_pin=15, right_pin=16, test_pin=7):
        #gpio.setmode(gpio.BCM) 
        #test_pin = 4 # GPIO 4
        #forward_pin = 17   # (GPIO 17)
        #backward_pin = 27  # GPIO 27
        #left_pin = 22 # GPIO 22
        #right_pin = 23 # GPIO 24</p><p>        self.test_pin=test_pin
        self.forward_pin=forward_pin
        self.backward_pin=backward_pin
        self.left_pin=left_pin
        self.right_pin=right_pin</p><p>        gpio.setmode(gpio.BOARD)
        test_pin = 7 # GPIO 4
        forward_pin = 11   # (GPIO 17)
        backward_pin = 13  # GPIO 27
        left_pin = 15 # GPIO 22
        right_pin = 16 # GPIO 23</p><p>        gpio.setup(self.test_pin, gpio.OUT) 
        gpio.setup(self.forward_pin, gpio.OUT)
        gpio.setup(self.backward_pin, gpio.OUT)
        gpio.setup(self.left_pin, gpio.OUT)
        gpio.setup(self.right_pin, gpio.OUT)</p><p>        gpio.output(self.forward_pin, gpio.LOW)
        gpio.output(self.backward_pin, gpio.LOW)
        gpio.output(self.left_pin, gpio.LOW)
        gpio.output(self.right_pin, gpio.LOW) </p><p>    def clearAll(self):
        gpio.output(self.forward_pin, gpio.LOW)
        gpio.output(self.backward_pin, gpio.LOW)
        gpio.output(self.left_pin, gpio.LOW)
        gpio.output(self.right_pin, gpio.LOW)      </p><p>    def updown(self, direction, OnOff, tsecond): # direction F:forward , B:Backward
        if direction in ('F'):
           gpio.output(self.backward_pin, gpio.LOW)
           gpio.output(self.forward_pin, OnOff)
        if direction in ('B'):
           gpio.output(self.forward_pin, gpio.LOW)
           gpio.output(self.backward_pin, OnOff)
        time.sleep(tsecond)</p><p>    def leftright(self, direction, OnOff, tsecond): # direction L:left , R:Right
        if direction in ('L'):
           gpio.output(self.right_pin, gpio.LOW)
           gpio.output(self.left_pin, OnOff) 
        if direction in ('R'):
           gpio.output(self.left_pin, gpio.LOW)
           gpio.output(self.right_pin, OnOff)
        time.sleep(tsecond)</p><p>#try:
#    while True:
#        gpio.output(test_pin, gpio.HIGH)
#
#except KeyboardInterrupt:
#    gpio.cleanup()</p><p>if __name__ == '__main__':
    tcr = ToyCarRemote()
    for i in range(20):
        print('\n', 'Loop : ', i)
        print 'Forward 2 Second'
        tcr.updown('F', gpio.HIGH , 0)
        tcr.leftright('L', gpio.HIGH, 0)
        time.sleep(2)
        tcr.clearAll()
        print 'Stop Forward'
        tcr.updown('B', gpio.HIGH, 0)
        time.sleep(2)
        tcr.clearAll()</p>

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