Controlling brightness of Adafruit Neopixel 16 (ring) with a potentiometer

Other Hardware LEDs and Multiplexing
1

Hello everyone,

I am new to Arduino and would really appreciate some help. I am trying to control the brightness of an Adafruit Neopixel 16 ring using a potentiometer. Would anyone be able to point so some example code? Many thanks.

All the best,
-Farshad

2

Do you have any example code for the Neopixel ring?
Do any of the examples include code for varying the brightness?
Take a look at the examples in the IDE - there is at least one showing how to read a potentiometer.

3

Thank you. I will take a closer look. I am able to vary the brightness of 1 LED with a potentiometer. I just don't know how to translate that into controlling all (##) LEDs, in this case the 16 that are on the NeoPixle ring.

int potPosition; //this variable will hold a value based on the position of the potentiometer

void setup()
{
Serial.begin(9600); //start a serial connection with the computer

pinMode(13, OUTPUT); //set pin 13 as an output that can be set to HIGH or LOW
}

void loop()
{
//read the position of the pot
potPosition = analogRead(A0); //set potPosition to a number between 0 and 1023 based on how far the knob is turned
Serial.println(potPosition); //print the value of potPosition in the serial monitor on the computer

//change the LED blink speed based on the pot value
digitalWrite(13, HIGH); // Turn on the LED
delay(potPosition); // delay for as many miliseconds as potPosition (0-1023)

digitalWrite(13, LOW); // Turn off the LED
delay(potPosition); // delay for as many miliseconds as potPosition (0-1023)
}

4

You should create a varible for brightness
int brightness;
int potenciometer =A0;
int sensorValue;
int outputValue;
Insisde the loop use the variable to read analog input

sensorValue = analogRead(potenciometer );
Then map the value of analog read 0-1023 to the digital value of brightness 0-255

outputValue = map(sensorValue, 0, 1023, 0, 255);

Then call brightness function in the loop depending on the library you use
Ex. Brightness(outputValue)

See instructions: