The Code
Below is the code I loaded onto each of the ATTiny85 microcontrollers. Each stone had a slight modification to adjust for the the particular elemental color of that stone.
Elemental Stone Arduino Sketch
#include <Adafruit_NeoPixel.h>
//#include <avr/power.h>
//#include <avr/sleep.h>
//#include <avr/io.h> // Adds useful constants
//#include <util/delay.h> // Adds delay_ms and delay_us functions
//#include <avr/wdt.h>
const int SERVO_PIN = 0;
const int SWITCH_PIN = 2;
const int PIXEL_PIN = 4;
//Modes
const int STONE_MODE = 0;
const int RAINBOW_MODE = 1;
const int COLOR_WIPE = 2;
const int THEATER_CHASE = 3;
const int LAMP_100 = 4;
const int LAMP_75 = 5;
const int LAMP_50 = 6;
const int LAMP_25 = 7;
volatile int pixelMode = 0;
volatile boolean interrupted = false;
unsigned long startMillis;
unsigned long currentMillis;
const unsigned long MODE_SWITCH_DELAY = 1500;
const byte ledPin = 13;
volatile int counter = 0;
//bool previousSwitch = false;
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(3, PIXEL_PIN, NEO_GRB + NEO_KHZ800);
uint32_t blue = pixels.Color(0, 0, 255);
uint32_t red = pixels.Color(255, 0, 0);
uint32_t green = pixels.Color(0, 255, 0);
uint32_t yellow = pixels.Color(255, 100, 0);
void setup() {
//Serial.begin(9600);
//Serial.println("Booting...");
//ADCSRA &= ~(1<<ADEN);
//setup_watchdog(8); // approximately 0.5 seconds sleep
pinMode(SWITCH_PIN, INPUT_PULLUP);
attachInterrupt(0, changeMode, RISING);
pixelMode = STONE_MODE;
pixels.begin();
pixels.show();
}
void loop() {
switch (pixelMode) {
case STONE_MODE: //0
stone();
break;
case RAINBOW_MODE: //1
rainbow(20);
rainbowCycle(20);
break;
case COLOR_WIPE: //2
colorWipe(pixels.Color(255, 0, 0), 50); // Red
colorWipe(pixels.Color(0, 255, 0), 50); // Green
colorWipe(pixels.Color(0, 0, 255), 50); // Blue
break;
case THEATER_CHASE: //3
theaterChase(pixels.Color(127, 127, 127), 50); // White
theaterChase(pixels.Color(127, 0, 0), 50); // Red
theaterChase(pixels.Color(0, 0, 127), 50); // Blue
break;
case LAMP_100: //4
lamp(100);
break;
case LAMP_75: //5
lamp(75);
break;
case LAMP_50: //6
lamp(50);
break;
case LAMP_25: //7
lamp(25);
break;
}
interrupted = false;
}
void changeMode() {
currentMillis = millis(); //get the current "time" (actually the number of milliseconds since the program started)
if (currentMillis - startMillis >= MODE_SWITCH_DELAY) {
interrupted = true;
pixelMode = pixelMode + 1;
if (pixelMode > 7) {pixelMode = 0;}
startMillis = currentMillis;
}
}
//void sleep() {
// ADCSRA &= ~_BV(ADEN); // ADC off
// set_sleep_mode(SLEEP_MODE_PWR_DOWN); // replaces above statement
// sleep_enable(); // Sets the Sleep Enable bit in the MCUCR Register (SE BIT)
// sleep_cpu(); // sleep
// sleep_disable(); // Clear SE bit
// ADCSRA |= _BV(ADEN); // ADC on
//} // sleep
void colorWipe(uint32_t c, uint8_t wait) {
for(uint16_t i=0; i<pixels.numPixels(); i++) {
pixels.setPixelColor(i, c);
pixels.show();
delay(wait);
}
}
void rainbow(uint8_t wait) {
uint16_t i, j;
for(j=0; j<256; j++) {
for(i=0; i<pixels.numPixels(); i++) {
pixels.setPixelColor(i, Wheel((i+j) & 255));
}
pixels.show();
delay(wait);
if (interrupted == true){break;}
}
}
// 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< pixels.numPixels(); i++) {
pixels.setPixelColor(i, Wheel(((i * 256 / pixels.numPixels()) + j) & 255));
}
pixels.show();
delay(wait);
if (interrupted == true){break;}
}
}
//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 < pixels.numPixels(); i=i+3) {
pixels.setPixelColor(i+q, c); //turn every third pixel on
}
pixels.show();
delay(wait);
for (uint16_t i=0; i < pixels.numPixels(); i=i+3) {
pixels.setPixelColor(i+q, 0); //turn every third pixel off
}
if (interrupted == true){break;}
}
}
}
//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 < pixels.numPixels(); i=i+3) {
pixels.setPixelColor(i+q, Wheel( (i+j) % 255)); //turn every third pixel on
}
pixels.show();
delay(wait);
for (uint16_t i=0; i < pixels.numPixels(); i=i+3) {
pixels.setPixelColor(i+q, 0); //turn every third pixel off
}
if (interrupted == true){break;}
}
}
}
// 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 pixels.Color(255 - WheelPos * 3, 0, WheelPos * 3);
}
if(WheelPos < 170) {
WheelPos -= 85;
return pixels.Color(0, WheelPos * 3, 255 - WheelPos * 3);
}
WheelPos -= 170;
return pixels.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}
void stone() {
float i, in, p0, p1, p2;
pixels.setBrightness(128);
for (int i = 0; i < 4; i++) {
for (in = 0; in < 6.283; in = in + 0.01) {
p0 = sin(in - PI) * 127.5 + 127.5;
p1 = sin(in - PI / 2) * 127.5 + 127.5;
p2 = sin(in) * 127.5 + 127.5;
//Wind (Yellow)
pixels.setPixelColor(0, .4 * p0, p0, 0);
pixels.setPixelColor(1, .4 * p1, p1, 0);
pixels.setPixelColor(2, .4 * p2, p2, 0);
//Earth (Green)
//pixels.setPixelColor(0, p0, 0, 0);
//pixels.setPixelColor(1, p1, 0, 0);
//pixels.setPixelColor(2, p2, 0, 0);
//Water (Blue)
//pixels.setPixelColor(0, 0, 0, p0);
//pixels.setPixelColor(1, 0, 0, p1);
//pixels.setPixelColor(2, 0, 0, p2);
//Fire (Red)
//pixels.setPixelColor(0, 0, p0, 0);
//pixels.setPixelColor(1, 0, p1, 0);
//pixels.setPixelColor(2, 0, p2, 0);
pixels.show();
if (interrupted == true){break;}
}
}
//Wind (Yellow)
pixels.setPixelColor(0, 100, 255, 0);
pixels.setPixelColor(1, 100, 255, 0);
pixels.setPixelColor(2, 100, 255, 0);
//Earth (Green)
//pixels.setPixelColor(0, 255, 0, 0);
//pixels.setPixelColor(1, 255, 0, 0);
//pixels.setPixelColor(2, 255, 0, 0);
pixels.show();
//delay(5000);
//sleep();
}
void lamp(int brightness) {
int i;
pixels.setBrightness(brightness);
ColorSet(pixels.Color(255, 255, 255));
//delay(5000);
//sleep();
}
// Set all pixels to a color (synchronously)
void ColorSet(uint32_t color)
{
for (int i = 0; i < pixels.numPixels(); i++)
{
pixels.setPixelColor(i, color);
}
pixels.show();
}
Styrofoam get everywhere; none the less these are some of my favorite art pieces that you have created.