Is there a way to set the brightness of a specific led array?

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1

Is there a way to set the brightness of a specific led array? I’ve only been able to set Brightness globaly

2

By using HSV, rather than CRGB, the ‘V’ component is the brightness of the LED, so you can manipulate the V at an individual pixel, at an array or at the NUM_LEDS level.

This means you can apply a mathematical operation to the V, to brighten and dim a pixel or range of pixels.

It is explained well here: https://github.com/FastLED/FastLED/wiki/Pixel-reference

For example:

//Full bright
leds[i] = CHSV( 160, 255, 255);

//80% bright
leds[i] = CHSV( 160, 255, 205);

//80% bright
leds[i] = CHSV( 160, 255, 205);

//50% bright
leds[i] = CHSV( 160, 255, 128);

//20% bright
leds[i] = CHSV( 160, 255, 50);

Work that into your code how you will - by a mathematical formula or by direct manipulation, such as:

// Set up a CHSV color
CHSV myBlue( 160, 128, 255);
// Change brightness by manipulating the ‘Value’ component

myBlue.val == 205 // 80%
myBlue.val == 128 // 50%
myBlue.val == 50 // 20%

3

Thank you, I had forgotten that this lib supported HSV!!

4

Small question, how do you make white in HSV?