LED Matrix (8x8)¶

A small 8x8 LED matrix to display images, characters or small animations.

Product: https://www.adafruit.com/product/1051
Raspberry Pi set up: https://learn.adafruit.com/adafruit-led-backpack/1-2-8x8-python-wiring-and-setup

##
# Quick start, define image and then mmove round
#

import time

import board
import busio
from adafruit_ht16k33 import matrix

# Create the I2C interface.
i2c = busio.I2C(board.SCL, board.SDA)

# Create the matrix instance.
matrix = matrix.Matrix8x8(i2c, address=0x71, auto_write=True)

# Clear the matrix.
matrix.fill(0)

# Set a pixel in the origin 0, 0 position.
matrix[0, 0] = 1

time.sleep(3)

matrix.fill(0)

# Define a ball
img = [
    [0,0,1,1,1,1,0,0],
    [0,1,0,0,0,0,1,0],
    [1,0,0,0,0,0,0,1],
    [1,0,0,1,1,1,0,1],
    [1,0,1,1,1,1,1,1],
    [0,1,1,1,1,1,1,0],
    [0,0,1,1,1,1,0,0],
    [0,0,0,0,0,0,0,0]
]

for x in range(8):
    for y in range(8):
        matrix.pixel(x, y, img[x][y])

# Move the image round
while True:
    for frame in range(8):
        matrix.shift_right(True)
        time.sleep(0.1)
    for frame in range(8):
        matrix.shift_down(True)
        time.sleep(0.1)
    for frame in range(8):
        matrix.shift_left(True)
        time.sleep(0.1)
    for frame in range(8):
        matrix.shift_up(True)
        time.sleep(0.1)

##
# Quick start, scroll dot, load images from files
#

from time import sleep

import board
from adafruit_ht16k33.matrix import Matrix8x8
from PIL import Image

# Define width and height of matrix
WIDTH = HEIGHT = 8
matrix = Matrix8x8(board.I2C(), address=0x71, auto_write=False)

# Set brightness for whole matrix 0.0-1.0
matrix.brightness = 0.5

# Define some stripes
imgs = [
    [1,1,1,1,1,1,1,1,
    0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,
    0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,
    0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,
    0,0,0,0,0,0,0,0],
    [0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,
    0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,
    0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1,
    0,0,0,0,0,0,0,0,
    1,1,1,1,1,1,1,1]
]

# Set blink rate for whole matrix 0-3 by 0.25
# matrix.blink_rate = 1

# Running LED
for i in range(2):
    for x in range(8):
        for y in range(8):
            matrix[x, y] = 1
            matrix.show()
            sleep(0.04)
            matrix[x,y] = 0
            matrix.show()

# Load two images
images = [Image.open("arrow1.png"), Image.open("arrow2.png")]
for i in range(10):
    matrix.image(images[i % 2])
    matrix.show()
    sleep(0.5)

sleep(1)

# Animate stripes
for i in range(15):
    count = 0
    for x in range(WIDTH):
        for y in range(HEIGHT):
            matrix[x, y] = imgs[i%2][count]
            count += 1
    matrix.show()
    sleep(0.2)

# Clear matrix
matrix.fill(0)
matrix.show()

##
# Space invader animation
#

# SPDX-FileCopyrightText: 2018 Phillip Burgess/paintyourdragon for Adafruit Industries
#
# SPDX-License-Identifier: MIT

import time

import adafruit_ht16k33.matrix
import board
import busio as io


matrix = adafruit_ht16k33.matrix.Matrix8x8(io.I2C(board.SCL, board.SDA), address=0x71, auto_write=False)

WIDTH = HEIGHT = 8
x = y = 0
matrix.fill(0)
matrix.show()

# Seconds to pause between frames
frame_delay = [.25, .25, .25, .25, .25, .25, .25, .25, .25, .25, .25, .25,
            .125, .125, .125, .125, .125, .125, .125, .125, .125]

# Counter for animation frames
frame_count = 0

# Animation bitmaps
animation = [
    # frame 0 - alien #1 frame 1
    [[0, 0, 0, 1, 1, 0, 0, 0], [0, 0, 1, 1, 1, 1, 0, 0],
    [0, 1, 1, 1, 1, 1, 1, 0], [1, 1, 0, 1, 1, 0, 1, 1],
    [1, 1, 1, 1, 1, 1, 1, 1], [0, 0, 1, 0, 0, 1, 0, 0],
    [0, 1, 0, 1, 1, 0, 1, 0], [1, 0, 1, 0, 0, 1, 0, 1]],
    # frame 1 - alien #1 frame 2
    [[0, 0, 0, 1, 1, 0, 0, 0], [0, 0, 1, 1, 1, 1, 0, 0],
    [0, 1, 1, 1, 1, 1, 1, 0], [1, 1, 0, 1, 1, 0, 1, 1],
    [1, 1, 1, 1, 1, 1, 1, 1], [0, 0, 1, 0, 0, 1, 0, 0],
    [0, 1, 0, 1, 1, 0, 1, 0], [0, 1, 0, 0, 0, 0, 1, 0]],
    # frame 2 - alien #1 frame 1 (duplicate frame 1)
    [[0, 0, 0, 1, 1, 0, 0, 0], [0, 0, 1, 1, 1, 1, 0, 0],
    [0, 1, 1, 1, 1, 1, 1, 0], [1, 1, 0, 1, 1, 0, 1, 1],
    [1, 1, 1, 1, 1, 1, 1, 1], [0, 0, 1, 0, 0, 1, 0, 0],
    [0, 1, 0, 1, 1, 0, 1, 0], [1, 0, 1, 0, 0, 1, 0, 1]],
    # frame 3 - alien #1 frame 2 (duplicate frame 2)
    [[0, 0, 0, 1, 1, 0, 0, 0], [0, 0, 1, 1, 1, 1, 0, 0],
    [0, 1, 1, 1, 1, 1, 1, 0], [1, 1, 0, 1, 1, 0, 1, 1],
    [1, 1, 1, 1, 1, 1, 1, 1], [0, 0, 1, 0, 0, 1, 0, 0],
    [0, 1, 0, 1, 1, 0, 1, 0], [0, 1, 0, 0, 0, 0, 1, 0]],
    # frame 4 - alien #2 frame 1
    [[0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 1, 1, 1, 1, 0, 0],
    [0, 1, 1, 1, 1, 1, 1, 0], [1, 1, 0, 1, 1, 0, 1, 1],
    [1, 1, 0, 1, 1, 0, 1, 1], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 0, 1, 0, 0, 1, 0, 0], [1, 1, 0, 0, 0, 0, 1, 1]],
    # frame 5 - alien #2 frame 2
    [[0, 0, 1, 1, 1, 1, 0, 0], [0, 1, 1, 1, 1, 1, 1, 0],
    [1, 1, 0, 1, 1, 0, 1, 1], [1, 1, 0, 1, 1, 0, 1, 1],
    [0, 1, 1, 1, 1, 1, 1, 0], [0, 0, 1, 0, 0, 1, 0, 0],
    [0, 0, 1, 0, 0, 1, 0, 0], [0, 0, 1, 0, 0, 1, 0, 0]],
    # frame 6 - alien #2 frame 1 (duplicate frame 5)
    [[0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 1, 1, 1, 1, 0, 0],
    [0, 1, 1, 1, 1, 1, 1, 0], [1, 1, 0, 1, 1, 0, 1, 1],
    [1, 1, 0, 1, 1, 0, 1, 1], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 0, 1, 0, 0, 1, 0, 0], [1, 1, 0, 0, 0, 0, 1, 1]],
    # frame 7 - alien #2 frame 2 (duplicate frame 6)
    [[0, 0, 1, 1, 1, 1, 0, 0], [0, 1, 1, 1, 1, 1, 1, 0],
    [1, 1, 0, 1, 1, 0, 1, 1], [1, 1, 0, 1, 1, 0, 1, 1],
    [0, 1, 1, 1, 1, 1, 1, 0], [0, 0, 1, 0, 0, 1, 0, 0],
    [0, 0, 1, 0, 0, 1, 0, 0], [0, 0, 1, 0, 0, 1, 0, 0]],
    # frame 8 - alien #3 first frame
    [[0, 0, 1, 0, 0, 1, 0, 0], [0, 0, 1, 0, 0, 1, 0, 0],
    [0, 1, 1, 1, 1, 1, 1, 0], [1, 1, 0, 1, 1, 0, 1, 1],
    [1, 1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1, 1],
    [1, 0, 1, 0, 0, 1, 0, 1], [0, 0, 1, 0, 0, 1, 0, 0]],
    # frame 9 - alien #3 second frame
    [[0, 0, 1, 0, 0, 1, 0, 0], [1, 0, 1, 0, 0, 1, 0, 1],
    [1, 1, 1, 1, 1, 1, 1, 1], [1, 1, 0, 1, 1, 0, 1, 1],
    [1, 1, 1, 1, 1, 1, 1, 1], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 0, 1, 0, 0, 1, 0, 0], [0, 1, 0, 0, 0, 0, 1, 0]],
    # frame 10 - alien #3 first frame (duplicate frame 9)
    [[0, 0, 1, 0, 0, 1, 0, 0], [0, 0, 1, 0, 0, 1, 0, 0],
    [0, 1, 1, 1, 1, 1, 1, 0], [1, 1, 0, 1, 1, 0, 1, 1],
    [1, 1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1, 1],
    [1, 0, 1, 0, 0, 1, 0, 1], [0, 0, 1, 0, 0, 1, 0, 0]],
    # frame 11 - alien #3 second frame (duplicate frame 10)
    [[0, 0, 1, 0, 0, 1, 0, 0], [1, 0, 1, 0, 0, 1, 0, 1],
    [1, 1, 1, 1, 1, 1, 1, 1], [1, 1, 0, 1, 1, 0, 1, 1],
    [1, 1, 1, 1, 1, 1, 1, 1], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 0, 1, 0, 0, 1, 0, 0], [0, 1, 0, 0, 0, 0, 1, 0]],
    # frame 12 - alien #4 first frame
    [[0, 0, 1, 1, 1, 1, 0, 0], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 0, 1, 1, 0, 0, 1, 1], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 0, 1, 1, 1, 1, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 1, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0]],
    # frame 13 - alien #4 second frame
    [[0, 0, 1, 1, 1, 1, 0, 0], [0, 1, 1, 1, 1, 1, 1, 0],
    [1, 0, 0, 1, 1, 0, 0, 1], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 0, 1, 1, 1, 1, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 1, 0, 0, 0], [0, 0, 0, 0, 1, 0, 0, 0]],
    # frame 14 - alien #4 third frame (not a repeat)
    [[0, 0, 1, 1, 1, 1, 0, 0], [0, 1, 1, 1, 1, 1, 1, 0],
    [1, 1, 0, 0, 1, 1, 0, 0], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 0, 1, 1, 1, 1, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 1, 0, 0, 0]],
    # frame 15 - alien #4 fourth frame (not a repeat)
    [[0, 0, 1, 1, 1, 1, 0, 0], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 1, 1, 0, 0, 1, 1, 0], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 0, 1, 1, 1, 1, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0]],
    # frame 16 - alien #4 first frame (duplicate frame 12)
    [[0, 0, 1, 1, 1, 1, 0, 0], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 0, 1, 1, 0, 0, 1, 1], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 0, 1, 1, 1, 1, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 1, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0]],
    # frame 17 - alien #4 second frame (duplicate frame 13)
    [[0, 0, 1, 1, 1, 1, 0, 0], [0, 1, 1, 1, 1, 1, 1, 0],
    [1, 0, 0, 1, 1, 0, 0, 1], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 0, 1, 1, 1, 1, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 1, 0, 0, 0], [0, 0, 0, 0, 1, 0, 0, 0]],
    # frame 18 - alien #4 second frame (duplicate frame 14)
    [[0, 0, 1, 1, 1, 1, 0, 0], [0, 1, 1, 1, 1, 1, 1, 0],
    [1, 1, 0, 0, 1, 1, 0, 0], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 0, 1, 1, 1, 1, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 1, 0, 0, 0]],
    # frame 19 - alien #4 second frame (duplicate frame 15)
    [[0, 0, 1, 1, 1, 1, 0, 0], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 1, 1, 0, 0, 1, 1, 0], [0, 1, 1, 1, 1, 1, 1, 0],
    [0, 0, 1, 1, 1, 1, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0]]
]

# Run until we are out of animation frames
# Populate matrix
while True:
    if frame_count < len(animation):
        for x in range(WIDTH):
            for y in range(HEIGHT):
                matrix.pixel(x, y, animation[frame_count][x][y])

        # next animation frame
        frame_count += 1

        # show animation
        matrix.show()

        # pause for effect
        time.sleep(frame_delay[frame_count])

    else:
        matrix.fill(0)
        matrix.show()
        time.sleep(.1)
        frame_count = 0

LED Matrix (8x8)¶

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