OmbresColorees

Ateliers Ombres colorées

réalisé à la bibliothèque de la cité le 2/11/2022

https://twitter.com/TinkeringStudio/status/1587885160606814208

Baton lumineux montés avec un micro-bit et une bande de 30 leds

programme en micro-python https://python.microbit.org/v/3/project

<syntaxhighlight>

from microbit import *

import neopixel

from random import randint

# Setup the Neopixel strip on pin0 with a length of 30 pixels

np = neopixel.NeoPixel(pin0, 30)

couleur_set=[(60,0,0),(0,60,0),(60,60,0),(0,0,100),(30,30,30),(0,0,0)]

compte=0

taille=1

maxled=8

def wheel(pos):

  #Input a value 0 to 255 to get a color value.

  #The colours are a transition r - g - b - back to r.

   if pos < 0 or pos > 255:

       return (0, 0, 0)

   if pos < 85:

       return (255 - pos * 3, pos * 3, 0)

   if pos < 170:

       pos -= 85

       return (0, 255 - pos * 3, pos * 3)

   pos -= 170

   return (pos * 3, 0, 255 - pos * 3)

def rainbow_cycle(wait):

  for j in range(255):

      for i in range(n):

          rc_index = (i * 256 // n) + j

          np[i] = wheel(rc_index & 255)

       np.write()

       time.sleep_ms(wait)

     

while True:

   #Iterate over each LED in the strip

   if button_a.is_pressed() and button_b.is_pressed():

       rainbow_cycle(5)

       break

   elif button_a.is_pressed():

       compte=(compte+1)%len(couleur_set)

   elif button_b.is_pressed():

       taille=(taille+1)%maxled

   for pixel_id in range(0, len(np)):

       # Assign the current LED a random red, green and blue value between 0 and 60

       np[pixel_id] = couleur_set[compte]

       np[pixel_id-taille] = (0, 0, 0)

       # Display the current pixel data on the Neopixel strip

       np.show()

       sleep(50)

</syntaxhighlight>