Want leds strip, model WS2812B, to turn on with my voice and turn off when I sto

Hello. I'm new to coding. I wanted to my leds strip model WS2812B to turn on with my voice and turn off when I stop talking. I connected my led to the power supply and connected a microphone sensor to my arduino uno. Also how can you make it turn on if I say "On" and make it turn off when I say "off".

#include <FastLED.h>

int r=252;
int g=0;
int b=0;

#define LED_PIN     7
#define NUM_LEDS    150

int s=0;

void setup() {

  FastLED.addLeds<WS2812, LED_PIN, GRB>(leds, NUM_LEDS);
  for (int i = 74; i >= 0; i--) 
     leds[i] = CRGB ( r,g,b);
     leds[149-i] = CRGB (r,g,b );

  Serial.println("Ready    ");

void loop()
    leds[74]=CRGB (20, 135, 217);
    leds[75]=CRGB (20, 135, 217);
  else if((s>=40)&&(s<=100))
     leds[74]=CRGB (20, 217, 30);
    leds[75]=CRGB (20, 217, 30);
     leds[74] = CRGB ( r,g,b);
     leds[75] = CRGB ( r,g,b);
    for (int i = 0; i <= 74; i++) 
     leds[i] = leds[i+1];
     leds[149-i] = leds[148-i];


Welcome to the forum.

Please read the post at the start of any forum , entitled "How to use this Forum".
Then look down to "code problems" about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.

Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?

I would suggest you go and edit your subject to something like;

"Want leds strip, model WS2812B, to turn on with my voice and turn off when I stop talking. "

You will get more forum members helping you.

Tom.... :slight_smile:

Turning the LEDs on and off to the presence of absence of sound is not so hard. Just use a microphone connected to an analog port. Compare the incoming sound level (ADC counts) to a threshold.

Turning on and off a display with certain words is much much more difficult. Google "Arduino voice recognition" for some ideas.


Topics on the same project merged

Why did you start a second topic ?


Other post/duplicate DELETED
Please do NOT cross post / duplicate as it wastes peoples time and efforts to have more than one post for a single topic.

Continued cross posting has resulted in a time out from the forum.

Can take a few moments to Learn and Use The Forum

Hello, Welcome to the Arduino Forum. This guide explains how to get the best out of this forum. Please read and follow the instructions below. Being new here you might think this is having rules for the sake of rules, but that is not the case. If you don’t follow the guidelines all that happens is there is a long exchange of posts while we try to get you to tell us what we need in order to help you, which is frustrating for you and frustrating for us. The people who try to help with your pro…

It will help you get the very best out of the forum in the future.

  • Your OS and version can be valuable information, please include it along with extra security you are using. Antivirus etc.
  • Always list the version of the IDE you are using and the board version if applicable.
  • Use quote or add error messages as an attachment NOT a picture.
  • How to insert an image into your post. ( Thanks sterretje )
  • Add your sketch where applicable but please use CODE TAGS
  • Add a SCHEMATIC were needed even if it is hand drawn
  • Add working links to any specific hardware as needed (NOT links to similar items)
  • Remember that the people trying to help cannot see your problem so give as much information as you can


  • Ensure you have FULLY inserted the USB cables.
  • Check you have a COMMON GROUND where required. ( Thanks Perry)
  • Where possible use USB 2.0 ports or a USB 2.0 POWERED HUB to rule out USB 3.0 issues.
  • Try other computers where possible.
  • Try other USB leads where possible.
  • You may not have the correct driver installed. CH340/341 or CP2102 or FT232 VCP Drivers - FTDI
  • There may be a problem with the board check or remove your wiring first.
  • Remove any items connected to pins 0 and 1.


  • Close any other serial programs before opening the IDE.
  • Ensure you turn off any additional security / antivirus just to test.
  • There may be a problem with the PC try RESTARTING it.
  • You may be selecting the wrong COM port.
  • Avoid cloud/network based installations where possible OR ensure your Network/Cloud software is RUNNING.
  • Clear your browsers CACHE.
  • Close the IDE before using any other serial programs.
  • Preferably install IDE’s as ADMINISTRATOR or your OS equivalent


  • CH340/341 based clones do not report useful information to the “get board info” button.
  • NANO (Old Types) some require you to use the OLD BOOTLOADER option.
  • NANO (ALL Types) See the specific sections lower in the forum.
  • NANO (NEW Types) Install your board CORE’s.
  • Unless using EXTERNAL PROGRAMMERS please leave the IDE selection at default “AVRISP mkII”.
  • Boards using a MICRO usb connector need a cable that is both DATA and CHARGE. Many are CHARGE ONLY.

CREATE editor install locations.

  • On macOs ~/Applications/ArduinoCreateAgent-1.1/ArduinoCreateAgent.app/Contents/MacOS/config.ini
  • On Linux ~/ArduinoCreateAgent-1.1/config.ini
  • On Windows C:\Users[your user]\AppData\Roaming\ArduinoCreateAgent-1.1

Performing the above actions may help resolve your problem without further help.

Language problem ?

Try a language closer to your native language:

Thanks to all those who helped and added to this list.

Rev 2.1.A

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