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picture1_Motor Ppt 83132 | Raspberrypi Pwm Servo


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File: Motor Ppt 83132 | Raspberrypi Pwm Servo
pwm pulse width modulation modulation technique used to encode a message into a pulsing signal control of the power supplied to electrical devices especially to inertial loads such as motors ...

icon picture PPTX Filetype Power Point PPTX | Posted on 11 Sep 2022 | 3 years ago
Partial capture of text on file.
   PWM(Pulse Width Modulation)?
   ● Modulation technique used to encode a message into a pulsing signal.
   ● Control of the power supplied to electrical devices, especially to inertial loads 
     such as motors.
                 https://en.wikipedia.org/wiki/Pulse-width_modulation
                                                 2
   PWM + Servo Motor(SG90)
                                           0도
                                           45도
                                           90도
                  http://www.piccircuit.com/shop/picture/motor/servo_operation.png
                                                               3
   Wiring
    ● RPi GPIO18 - PWM
    ● RPi 5V - Vcc
    ● RPi GND - Ground
                                                    4
                             import RPi.GPIO as GPIO
                             import time
   Python code               import sys
                             GPIO.setwarnings(False)
    ● $ python3 servo.py 1   GPIO.setmode(GPIO.BCM)
    ● $ python3 servo.py 1.5 GPIO.setup(18, GPIO.OUT)
    ● $ python3 servo.py 2   pwm = GPIO.PWM(18, 50) # 50Hz
                             pwm.start(1)
                             if len(sys.argv) != 2:
                                print('python servo.py 1~3’)
                             else:
                                ms = float(sys.argv[1])
                                dcycle = ms / 20.0 * 100  # percent
                                pwm.ChangeDutyCycle(dcycle)
                             time.sleep(2) # wait until the device receiving
                             pwm.stop()
                             GPIO.cleanup()              5
   Exercise
    ● 도도도 3도 도도도도
    ● 도 도도도 도도도 도도 도도 도도도 도도 도도도 도도 도도도.
    ● 도도 도도 도도 LED도 GPIO도 도도도도 도도도 도도.
                                                            6
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