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6. October 2018 22:43
by ĐÀO TƯỜNG SƠ
0 Comments

Raspberry Pi - Dự án 05: Điều chỉnh độ sáng tối của Led/ tốc độ động cơ bằng giao diện thanh kéo

6. October 2018 22:43 by ĐÀO TƯỜNG SƠ | 0 Comments

1. Linh kiện:

- Giống dự án 01

2. Sơ đồ kết nối

- Giống dự án 01

3. Mã lệnh Python: tạo file mới có tên gui_slider.py

from tkinter import *
import RPi.GPIO as GPIO
import time


GPIO.setmode(GPIO.BCM)
GPIO.setup(18, GPIO.OUT)
pwm = GPIO.PWM(18, 500)
pwm.start(100)


class App:


     def __init__(self, master):
          frame = Frame(master)
          frame.pack()
          scale = Scale(frame, from_=0, to=100,
          orient=HORIZONTAL, command=self.update)
          scale.grid(row=0)


     def update(self, duty):
         pwm.ChangeDutyCycle(float(duty))


root = Tk()
root.wm_title('PWM Power Control')
app = App(root)
root.geometry("200x50+0+0")
root.mainloop()

4. Chạy chương trình

sudo python gui_slider.py

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