Neopixel doesn't turn back on

[laptopman]

Using a neopixel stick, I have full functionality.

However, if I say strip.setBrightness(0); I am unable to get it to light back up. If my code says strip.setbrightness(1); everything works as expected. help?

[Franklin97355]

What have you tried to get it to light back up? Do you mean that after you set it to 0 setting it to 1 or any other number won't turn it back on?

[laptopman]

Correct

#include <Adafruit_NeoPixel.h>

#define PIXEL 4
#define DUTY 8
boolean lights = 0;
Adafruit_NeoPixel strip = Adafruit_NeoPixel(8, PIXEL, NEO_GRB + NEO_KHZ800);

void setup(){
strip.begin();
strip.setBrightness(DUTY); // Set future
strip.show(); // Initialize all pixels to 'off'
strip.setPixelColor(0, 255, 0 ,0);
strip.show();
}

void loop(){
strip.setPixelColor(0, 255, 255, 0);
strip.setBrightness(8);
strip.show();
delay(1000);
strip.setBrightness(0);
strip.show();
delay(1000);
}

Results in the strip turning on, then off. It does not turn on again.
I had a version of this code with Serial feedback and the loop continued to run but the led's no longer came on

[adafruit_support_bill]

However, if I say strip.setBrightness(0); I am unable to get it to light back up.

This is normal for setBrightness(). It is a 'lossy' operation and works better for dimming than for brightening.

setBrightness() operates directly on the neopixel data in memory and when you decrease the brightness, you lose the original data. Once the brightness goes to 0, all the pixel values in memory are zero and there is no way to restore them.

[laptopman]

Okay, so how to I blink a neopixel?

[adafruit_support_bill]

Code: Select all

void loop()
{
strip.setPixelColor(0, 255, 255, 0);
strip.show();
delay(1000);
strip.setPixelColor(0, 0, 0, 0);
strip.show();
delay(1000);
}