Nano not controlling LEDs

Other Hardware LEDs and Multiplexing
21

@whywari I would not request a return/exchange because in my opinion it would be dishonest and unethical. But if you decide to do that, do not reveal to the seller that you connected the string to a 12V supply.

22

I checked for an arrow and there is one on the last LED pointing down so I am working with the correct end for the data.

23

Last LED has an arrow pointing to the wire so I am working with the beginning end.

24

The ebay didn't have pics of the secondary side.
You could try the other, wouldn't hurt anything (esp. at this point).

I always include the resistor between the Arduino and that first Data_In.

25

I did put a 220 resistor between Nano and first LED and still cannot control. I put an LED on my breadboard on data out pin and it flashes so I am certain data is going out the pin but of course I cannot tell if it is the correct data.

26

This isn't with FastLED, I don't know that one so well - this is with the Adafruit NeoPixel library. (Is it part of the Arduino package nowadays??).

Anyway - I vouch for it 100% (I just ran it).

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
 #include <avr/power.h> // Required for 16 MHz Adafruit Trinket
#endif
#define PIN       7 // 
#define NUMPIXELS 1 // Popular NeoPixel ring size

Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup() 
{
  pixels.begin();
  pixels.clear();
}

void loop() 
{
  pixels.setPixelColor(0, pixels.Color(0,0,100));
  pixels.show();
  delay(1000);
  pixels.setPixelColor(0, pixels.Color(0,100,0));
  pixels.show();
  delay(1000);
  pixels.setPixelColor(0, pixels.Color(100,0,0));
  pixels.show();
  delay(1000);
}
27

At this point, it's probably worth getting a different WS2811 strip. Maybe you can find a cheap-short one.

It would be best to buy one from a supplier that might be more reliable than some unknown 3rd-party Amazon supplier (1). Adafruit is reliable but it looks like most of what they sell is WS2812. They should generally be interchangeable, except that a lot of 2811 strips are 12V. And it would be best to minimize the variables.

It's probably also worthwhile to try a different Arduino.

(1) I do generally trust stuff sold directly by Amazon but they sell so much stuff that they can't possibly have quality control on everything!

28

Lights are working. The issue was the “compatible” Nano. I loaded the board software lgt8fx from David Buezas which fixed the issue. This issue is closed now but I do not know how to close it or just let the normal timer to close it. The following are the parameters I had to use:

I appreciate all of the responses I got to help.

29

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