… How I wonder what you are?
I know what this is… 10 minutes work in OpenSCAD, glow in the dark PLA + some careful slicing, and a SeedStudio XIAO RP2040 running micropython.
The XIAO is really wasted doing this… but the board costs 6 Euros (inc. postage) and has an onboard NeoPixel; I brought it for other reasons but I figured it could be put to use on my tree in the meantime.
SCAD:
// Christmas star with cutout for Xiao RP 2040
$fn=180;
difference() {
translate([0,0,60])
for (a=[-140,-70,0,70,140]) {
hull() {
sphere(18);
rotate([a,0,0]) translate([0,0,70]) sphere(6);
}
}
linear_extrude(height=62,convexity=10)
translate([0,-9]) square([6,18]);
}
main.py
from machine import Pin
import neopixel
from utime import sleep
from random import choice
pixel = neopixel.NeoPixel(Pin(12), 1)
pixelPower = Pin(11, Pin.OUT)
pixelPower.on()
speeds = range(1,6,1)
intensities = [1,2,3,7,15,31,47,63,95,127,255]
while True:
val = choice(intensities)
cycle = [(val,0,0),(val,val,0),(0,val,0),(0,val,val),(0,0,val),(val,0,val)]
for pixel[0] in cycle:
pixel.write()
sleep(choice(speeds)*0.015)
I’ll post an ‘action shot’ and link to the (rather large) .stl later.
