Hi. My name is Davy.

@davy-ps

You shouldn't need shift registers and the like unless you have something very complicated in mind. Try looking at WS2812B lights which can be individually addressed with an Arduino or similar in button form

"https://www.amazon.ca/gp/product/B01K4HTXOC/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1"

or strip form

"https://www.amazon.ca/gp/product/B00JR0MJIU/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1"

very easy to use.

Check out some Arduino examples like the one at 

https://www.tweaking4all.com/hardware/arduino/arduino-ws2812-led/

Hi Will. I have downloaded following code from Dronebot site and have set up breadboard as per Bill's YouTube demo. All works well. What I am trying to figure out is this. 

Via Arduino and using one output can I individually light LEDs? EG my idea for the Monopoly Board would be to have a red LED on the on each of the red properties on the board light up for say, ten seconds. These would then go out and then the green ones would light on the green properties and the loop would continue around all the colours. so 3 RED on then OFF, 3 Green on then OFF, 3 YELLOW on then OFF and so on.

I have been messing about with the attached sketch and in the void loop I deleted everything from / Theater Chase Examples down, leaving only the Colour wipe examples, however, when I try to run the modified sketch I get an error message exit status 1 'clearLEDs' was not declared in this scope.

Do you have any ideas on this.

Cheers Mate,

Davy.

[code]
/*
WS2812 RGB LED Test
ws2812-rgb-test.ino
Uses Adafruit NeoPixel Library
Functions from Adafruit NeopPixel Strandtest Examples
DroneBot Workshop 2018
https://dronebotworkshop.com
*/

// Include Adafruit NeoPixel Library
#include <Adafruit_NeoPixel.h>

// Define Arduino connection pin
#define LED_PIN 4

// Define the number of LEDs - change if necessary
#define LED_COUNT 4

// Create instance of NeoPixel class
// Parameter 1 = number of pixels in leds
// 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 leds = Adafruit_NeoPixel(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);

void setup()
{
// Setup Serial Monitor
Serial.begin(9600);

// Initialize the LEDs
leds.begin();
// Clear them all
clearLEDs();
// Show the result of clearing the LEDs
leds.show();

}

void loop() {

// Print to Serial Monitor
Serial.println("Starting RGB LED Demo");

// Cycle through Color Wipe Examples
// Set colors to Red
Serial.println("Color Wipe - RED");
colorWipe(leds.Color(0, 255, 0),200);
delay(1000);
// Set colors to Green
Serial.println("Color Wipe - GREEN");
colorWipe(leds.Color(255,0,0), 200);
delay(1000);
// Set Colors to Blue
Serial.println("Color Wipe - BLUE");
colorWipe(leds.Color(0, 0, 255), 200);
delay(1000);
// Set colors to Yellow
Serial.println("Color Wipe - YELLOW");
colorWipe(leds.Color(255, 255, 0), 200);
delay(1000);

// Theater Chase Examples
// White
Serial.println("Theater Chase - WHITE");
theaterChase(leds.Color(127, 127, 127), 50);
delay(1000);
// Red
Serial.println("Theater Chase - RED");
theaterChase(leds.Color(0,127, 0), 50);
delay(1000);
// Green
Serial.println("Theater Chase - GREEN");
theaterChase(leds.Color(0, 127, 0), 50);
delay(1000);
// Blue
Serial.println("Theater Chase - BLUE");
theaterChase(leds.Color(0, 0, 127), 50);
delay(1000);

// Rainbow Examples
Serial.println("Rainbow");
rainbow(20);
Serial.println("Rainbow Cycle");
rainbowCycle(20);
Serial.println("Rainbow Theater Chase");
theaterChaseRainbow(50);

//Finished
Serial.println("Loop Ended, Demo Finished!");
Serial.println(".................................");

}

// Function to set all LEDs off
void clearLEDs()
{
// Cycle through all LEDs
for (int i=0; i<LED_COUNT; i++)
{
// Set color to zero which is off
leds.setPixelColor(i, 0);
}
}

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

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

for(j=0; j<256; j++) {
for(i=0; i<leds.numPixels(); i++) {
leds.setPixelColor(i, Wheel((i+j) & 255));
}
leds.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< leds.numPixels(); i++) {
leds.setPixelColor(i, Wheel(((i * 256 / leds.numPixels()) + j) & 255));
}
leds.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 < leds.numPixels(); i=i+3) {
leds.setPixelColor(i+q, c); //turn every third pixel on
}
leds.show();

delay(wait);

for (uint16_t i=0; i < leds.numPixels(); i=i+3) {
leds.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 < leds.numPixels(); i=i+3) {
leds.setPixelColor(i+q, Wheel( (i+j) % 255)); //turn every third pixel on
}
leds.show();

delay(wait);

for (uint16_t i=0; i < leds.numPixels(); i=i+3) {
leds.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 leds.Color(255 - WheelPos * 3, 0, WheelPos * 3);
}
if(WheelPos < 170) {
WheelPos -= 85;
return leds.Color(0, WheelPos * 3, 255 - WheelPos * 3);
}
WheelPos -= 170;
return leds.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}
[/code]

@davy-ps 

I copied the sketch you posted, re-indented it and it runs fine (I haven't got the light strip, but the code works OK).

If you've changed this code, please post your updated sketch.

Hi Will,

Please see attached modified sketch. 

Cheers Mate,

Davy.

[code]

/*
WS2812 RGB LED Test
ws2812-rgb-test.ino
Uses Adafruit NeoPixel Library
Functions from Adafruit NeopPixel Strandtest Examples
DroneBot Workshop 2018
https://dronebotworkshop.com
*/

// Include Adafruit NeoPixel Library
#include <Adafruit_NeoPixel.h>

// Define Arduino connection pin
#define LED_PIN 4
// Define the number of LEDs - change if necessary
#define LED_COUNT 4

// Create instance of NeoPixel class
// Parameter 1 = number of pixels in leds
// 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 leds = Adafruit_NeoPixel(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);

void setup()
{
// Setup Serial Monitor
Serial.begin(9600);

// Initialize the LEDs
leds.begin();
// Clear them all
clearLEDs();
// Show the result of clearing the LEDs
leds.show();

}

void loop() {

// Print to Serial Monitor
Serial.println("Starting RGB LED Demo");

// Cycle through Color Wipe Examples
// Set colors to Red
Serial.println("Color Wipe - RED");
colorWipe(leds.Color(255, 0, 0), 200);
delay(1000);
// Set colors to Green
Serial.println("Color Wipe - GREEN");
colorWipe(leds.Color(0, 255, 0), 200);
delay(1000);
// Set Colors to Blue
Serial.println("Color Wipe - BLUE");
colorWipe(leds.Color(0, 0, 255), 200);
delay(1000);
// Set colors to Yellow
Serial.println("Color Wipe - YELLOW");
colorWipe(leds.Color(255, 255, 0), 200);
delay(1000);

}

[/code]

@davy-ps 

As a WAG (wild-assed guess), make sure that you haven't deleted the closing "}" in the loop() section. That is the one in the following code segment. If you chopped it off, you'd get the message you see.

Serial.println("Loop Ended, Demo Finished!");
Serial.println(".................................");

}

// Function to set all LEDs off
void clearLEDs()

Posted by: @davy-ps

Hi Will,

Please see attached modified sketch. 

 [snipt]

The compiler can't find that routine because you've deleted it from the sketch. You'll have to copy and paste it back into the bottom of the sketch.

@will 

Will. Thanks so much Mate. I now have the modified sketch running.

Davy.

@davy-ps 

Excellent !