The lamps shade is printed in PET-G using the “spiral outer contour mode” without any bottom layers.

The base is printed in silver ABS, 0.2mm resolution.

For both prints I used a 0.4mm nozzle.

The Arduino sketch and library I used are can be downloaded at: https://www.thingiverse.com/thing:3297082 or https://www.myminifactory.com/object/3d-print-81732. They are from AdaFruit and I just changed it a bit so the LED's slowly change color. For more info: https://learn.adafruit.com/adafruit-neopixel-uberguide/arduino-library-use

The 6 LED's are soldered in series to form a ring. Because they can take a max of 60mA each, I took the 5V from the Arduino's internal regulator.

Note: I had to hot-glue the Arduino to the base, so it can't move while plugging the USB cable in and out.

If you have any questions, feel free to ask :-)

Do you have constructive comments or think I made a mistake? Please tell me :-)

sketch--

#include <Adafruit_NeoPixel.h> #ifdef __AVR__   #include <avr/power.h> #endif

#define PIN 2

// Parameter 1 = number of pixels in strip // Parameter 2 = Arduino pin number (most are valid) // Parameter 3 = pixel type flags, add together as needed: //   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs) //   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers) //   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products) //   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2) //   NEO_RGBW    Pixels are wired for RGBW bitstream (NeoPixel RGBW products) Adafruit_NeoPixel strip = Adafruit_NeoPixel(60, PIN, NEO_GRB + NEO_KHZ800);

// IMPORTANT: To reduce NeoPixel burnout risk, add 1000 uF capacitor across // pixel power leads, add 300 - 500 Ohm resistor on first pixel's data input // and minimize distance between Arduino and first pixel.  Avoid connecting // on a live circuit...if you must, connect GND first.

void setup() {   // This is for Trinket 5V 16MHz, you can remove these three lines if you are not using a Trinket   #if defined (__AVR_ATtiny85__)     if (F_CPU == 16000000) clock_prescale_set(clock_div_1);   #endif   // End of trinket special code

  strip.begin();   strip.setBrightness(50);   strip.show(); // Initialize all pixels to 'off' }

void loop() {

  rainbow(80);

}

// Fill the dots one after the other with a color void colorWipe(uint32_t c, uint8_t wait) {   for(uint16_t i=0; i<strip.numPixels(); i++) {     strip.setPixelColor(i, c);     strip.show();     delay(wait);   } }

void rainbow(uint8_t wait) {   uint16_t i, j;

  for(j=0; j<256; j++) {     for(i=0; i<strip.numPixels(); i++) {       strip.setPixelColor(i, Wheel((i+j) & 255));     }     strip.show();     delay(wait);   } }

// Slightly different, this makes the rainbow equally distributed throughout void rainbowCycle(uint8_t wait) {   uint16_t i, j;

  for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel     for(i=0; i< strip.numPixels(); i++) {       strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));     }     strip.show();     delay(wait);   } }

//Theatre-style crawling lights. void theaterChase(uint32_t c, uint8_t wait) {   for (int j=0; j<10; j++) {  //do 10 cycles of chasing     for (int q=0; q < 3; q++) {       for (uint16_t i=0; i < strip.numPixels(); i=i+3) {         strip.setPixelColor(i+q, c);    //turn every third pixel on       }       strip.show();

      delay(wait);

      for (uint16_t i=0; i < strip.numPixels(); i=i+3) {         strip.setPixelColor(i+q, 0);        //turn every third pixel off       }     }   } }

//Theatre-style crawling lights with rainbow effect void theaterChaseRainbow(uint8_t wait) {   for (int j=0; j < 256; j++) {     // cycle all 256 colors in the wheel     for (int q=0; q < 3; q++) {       for (uint16_t i=0; i < strip.numPixels(); i=i+3) {         strip.setPixelColor(i+q, Wheel( (i+j) % 255));    //turn every third pixel on       }       strip.show();

      delay(wait);

      for (uint16_t i=0; i < strip.numPixels(); i=i+3) {         strip.setPixelColor(i+q, 0);        //turn every third pixel off       }     }   } }

// Input a value 0 to 255 to get a color value. // The colours are a transition r - g - b - back to r. uint32_t Wheel(byte WheelPos) {   WheelPos = 255 - WheelPos;   if(WheelPos < 85) {     return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);   }   if(WheelPos < 170) {     WheelPos -= 85;     return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);   }   WheelPos -= 170;   return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0); }