Informatik an der Leibnizschule

Dies ist eine alte Version des Dokuments!

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from gpiozero import Button
import time
import math

def halfturn():
    global zeit
    global km_per_hour
    zeit2 = time.time()
    diff = zeit2 - zeit
    zeit = zeit2
    circumference_cm = math.pi * radius_cm
    speed_cm_per_sec = circumference_cm / diff
    
    km_per_sec = speed_cm_per_sec / 100000.0
    km_per_hour = km_per_sec * 3600
   
radius_cm = 9.0
zeit = time.time()
km_per_hour = 0

wind_speed_sensor = Button(5)
wind_speed_sensor.when_pressed = halfturn

old = km_per_hour
    
while True:
    if km_per_hour != old:
        old = km_per_hour
        print(km_per_hour, "km/h")
        time.sleep(1)
    else:
        print(0, "km/h")
        time.sleep(1)