Published January 18, 2020 © LGPL

NeoPixel RGB Mixinator

NeoPixel ring based RGB color mixer.

BeginnerFull instructions provided2 hours3,029

Most Practical - US Based Project

2020 China-US Young Maker Competition

Things used in this project

Hardware components

Rotary potentiometer (generic)

Adafruit NeoPixel Ring: WS2812 5050 RGB LED

UTSOURCE Electronic Parts

everything above can be found here for a low price

Arduino UNO

JLCPCB Customized PCB

Software apps and online services

Arduino IDE

Hand tools and fabrication machines

3D Printer (generic)

Story

Watch the video.

I first used Fusion360 to make an enclosure for this simple setup which consists of three potentiometers, an Arduino Nano, and a NeoPixel Ring which has 12 WS2812 RGB LEDs.

Originally I was planning to use an ATtiny85 to control the RGB but it only has two analog inputs but the requirement was three analog inputs so I used this Nano clone instead.

Thanks UTSOURCE.net to offer electronic components for this project!

you can check UTSOURCE.net, they deal in all kinds of electronic components, for example, Arduino board, attiny85, and many more.

Well first, print all the parts.

Then connect all the things together using wires or you can create a shield, like I did.

From here, download and install the Adafruit NeoPixel library, and upload the sketch.

Here's the link - https://github.com/adafruit/Adafruit_NeoPixel

Thingiverse link - https://www.thingiverse.com/thing:4079529

I'm working on its updated version in which I added a custom PCB for this project which is provided by JLCPCB, they make great PCB for low cost, do check them out.

Schematics

Code

code

#include <Adafruit_NeoPixel.h>
#define NEOPIXELS 12 
#define LEDsPin 9   
const int redPotPin = A0;      
const int greenPotPin = A1;   
const int bluePotPin = A2;  
int redValue = 0; 
int greenValue = 0; 
int blueValue = 0; 
int redPotValue = 0; 
int greenPotValue = 0; 
int bluePotValue = 0; 

Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NEOPIXELS, LEDsPin, NEO_GRB + NEO_KHZ800);
void setup() {
  pinMode(LEDsPin, OUTPUT);
  pinMode(redPotPin, INPUT);
  pinMode(greenPotPin, INPUT);
  pinMode(bluePotPin, INPUT);
}
void loop() {
  redPotValue = analogRead(redPotPin);
  delay(5);
  greenPotValue = analogRead(greenPotPin);
  delay(5);
  bluePotValue = analogRead(bluePotPin);
  redValue = map(redPotValue, 0, 1023, 0, 255);
  greenValue = map(greenPotValue, 0, 1023, 0, 255);
  blueValue = map(bluePotValue, 0, 1023, 0, 255);;
 
   for (int i = 0; i < NEOPIXELS; i++) {
    
    pixels.setPixelColor(i, pixels.Color(redValue, greenValue, blueValue));
    pixels.show(); 
    delay(50); 
  }
}