Trinkey Dance Party : fun pulsing colors for NeoTrinkey

trinkey_dance_code.py

# Trinkey dance party
# 2021 @todbot
import time
import board
import neopixel
import random
leds = neopixel.NeoPixel(board.NEOPIXEL, 4, brightness=0.3, auto_write=False)
bpm = 130
ms_per_beat = int(60e3 / bpm / 16)
i=0
while True:
    leds[0:] = [[max(i-8,0) for i in l] for l in leds] # fadeToBlackBy(8)
    leds.show()
    i = (i+1) % ms_per_beat
    if i==0:
        leds[0:] = [int(random.random() * 2**24) for l in leds] # each LED gets new random color
    time.sleep(0.01)  

How would you write this script so that pushing the buttons increases and decreases the BPM?

Here's how I would do that today:

# Trinkey dance party, now with changeable BPM
# 16 Jan 2023 - @todbot / Tod Kurt
#
import time, random, board, neopixel, rainbowio, touchio

leds = neopixel.NeoPixel(board.NEOPIXEL, 4, brightness=0.3, auto_write=False)
touch1 = touchio.TouchIn(board.TOUCH1)
touch2 = touchio.TouchIn(board.TOUCH2)

bpm = 130
i=0
while True:
    ms_per_beat = int(60e3 / bpm / 16)
    leds[0:] = [[max(i-8,0) for i in l] for l in leds] # same as "fadeToBlackBy(8)"
    leds.show()
    i = (i+1) % ms_per_beat
    if i==0:  # at the beat, each LED gets new random color
        leds[0:] = [rainbowio.colorwheel(random.random()*255) for l in leds]
    # touch pads change BPM up or down
    if touch1.value:
        bpm = bpm - 1
    if touch2.value:
        bpm = bpm + 1
    if touch1.value and touch2.value:  # reset BPM if both are touched
        bpm = 130

    time.sleep(0.01)

Thanks, this is great! Much appreciated. I'm getting started with simple coding and this has been really helpful. ae.

…

On Mon, Jan 16, 2023 at 11:30 PM Tod Kurt ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ How would you write this script so that pushing the buttons increases and decreases the BPM? Here's how I would do that today: Trinkey dance party, now with changable BPM# 16 Jan 2023 - @todbot / Tod Kurt#import time, random, board, neopixel, rainbowio, touchio leds = neopixel.NeoPixel(board.NEOPIXEL, 4, brightness=0.3, auto_write=False)touch1 = touchio.TouchIn(board.TOUCH1)touch2 = touchio.TouchIn(board.TOUCH2) bpm = 130i=0while True: ms_per_beat = int(60e3 / bpm / 16) leds[0:] = [[max(i-8,0) for i in l] for l in leds] # same as "fadeToBlackBy(8)" leds.show() i = (i+1) % ms_per_beat if i==0: # at the beat, each LED gets new random color leds[0:] = [rainbowio.colorwheel(random.random()*255) for l in leds] # touch pads change BPM up or down if touch1.value: bpm = bpm - 1 if touch2.value: bpm = bpm + 1 if touch1.value and touch2.value: # reset BPM if both are touched bpm = 130 time.sleep(0.01) — Reply to this email directly, view it on GitHub <https://gist.github.com/8c31150b373c8d2eb5d6c5f8fcafca12#gistcomment-4439259> or unsubscribe <https://github.com/notifications/unsubscribe-auth/A5IABKEQIVIZHH5P2XOUOJDWSY4B5BFKMF2HI4TJMJ2XIZLTSKBKK5TBNR2WLJDHNFZXJJDOMFWWLK3UNBZGKYLEL52HS4DFQKSXMYLMOVS2I5DSOVS2I3TBNVS3W5DIOJSWCZC7OBQXE5DJMNUXAYLOORPWCY3UNF3GS5DZVRZXKYTKMVRXIX3UPFYGLK2HNFZXIQ3PNVWWK3TUUZ2G64DJMNZZDAVEOR4XAZNEM5UXG5FFOZQWY5LFVEYTAOJSGY3DMMJTU52HE2LHM5SXFJTDOJSWC5DF> . You are receiving this email because you commented on the thread. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub> .

-- Andres Esparza 915.740.5178 http://lazymanadventures.wordpress.com/

Awesome, let me know if you have any other questions.
If you're just getting started, the above is using a Python trick called "list comprehensions" to do things in one line.
So for instance this line:

    leds[0:] = [rainbowio.colorwheel(random.random()*255) for l in leds]

is the same as:

    for i in range(len(leds)):
      leds[i] = rainbowio.colorwheel(random.random()*255)