Hi, Can someone help me with some code?

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1

Hi, Can someone help me with some code? I have 2 LED Strips (one on pin 5 and one on pin 7) I also have 2 buttons (a brightness button and a mode button). Currently the brightness button changes the brightness of BOTH LED strips. I just want the button to change the brightness of the stips on pin 5, and the strip on pin 7 to be set to a static brightness value unaffected by the button. How do i separate the brightnesses? i think it has to do something with FastLED.setBrightness( brightnessCounter ); but i don’t know how to change it. :frowning:
http://pastebin.com/01NX3H1h

2

Hi I had a quick look, but haven’t had time to really read through, I stopped at:
FastLED.setBrightness( brightnessCounter );
Because this is effectively a global call that affects all the LEDs in your code, not just _FACE

3

That’s what I thought. So how do I make it not global? Can I make two separate calls specifying the strip? Where is the fastLED documentation located?

4

There is some documentation in english: https://github.com/FastLED/FastLED/wiki/Overview

But I guess, you’ll need this documentation: https://github.com/FastLED/FastLED?files=1 which is unfortunately not in english, but in C++. :wink:

5

Thanks, maybe i’ll find something in the C++ version. ALready read the english one earlier and found nothing useful for my problem.

6

I usually use the CHSV conversion to control brightness without using the global variant.

for (int i = 0; i < NUM_LEDS; i++)
{
leds[i] = CHSV(hue, saturation, brightness);
}

7

You can try something like this in your loop to subtract or add to the current Value:
leds_FACE[i] -= CHSV(0, 0, 10) // Reduce pixel value some
or
leds_FACE[i] += CHSV(0, 0, 10) // Increase pixel value some

By putting a zero for Hue and Saturation you will only subtract or add to Value.

Also, instead of pixel by pixel, if you want to dim the whole strip at once you can use something like this and put it in a loop.
nscale8(leds_FACE, NUM_LEDS, 160); // Reduces brightness of whole strip
or
nscale8_video(leds_FACE, NUM_LEDS, 160); // Reduces brightness of whole strip
(The nscale8 function is found in the colorutils.h file in your libraries\FastLED directory.)

8

thanks guys, i figured it out had to change this line: leds_FACE[i] = ColorFromPalette( currentPalette_FACE, colorIndex_FACE, brightnessCounter, currentBlending_FACE); specifically the brightnessCounter varibale. Now i have to fix a button mode bug :confused: