user53434: I am doing a project for my master thesis and I have 6 stripes of WS2812B LEDs each one containing 77 LEDs. I finished the design and now want to turn them on.
I used an old power supply to power it, but now that I am running it, doesn't work. I checked the voltage with a multimeter and it shows that I have 5 volts and it seems doesn't have any problem but the data doesn't transfer to my strip.
I just copy past FastLED from libraries and changed the number of LEDs. I thought maybe I am using the Funduino from school, maybe this is a problem and I need another Arduino board? 



user19409: Are you completely sure that these are WS2812B LEDs? To read more, check out this great link from Core Electronics:
https://core-electronics.com.au/tutorials/addressable-rgb-led-controllers.html
It is more than likely your code. Download the code from a known working example and get that working. Try using an example program such as:   

https://howtomechatronics.com/tutorials/arduino/how-to-control-ws2812b-individually-addressable-leds-using-arduino/
https://core-electronics.com.au/tutorials/ws2812-addressable-leds-arduino-quickstart-guide.html
https://learn.adafruit.com/adafruit-neopixel-uberguide/software

Once you have known working hardware then delve into your own code and find the problem.
Also check your wiring with fresh eyes. It could be something simple.

53434: <p>I am doing a project for my master thesis and I have 6 stripes of <a href="https://cdn-shop.adafruit.com/datasheets/WS2812B.pdf" rel="nofollow noreferrer">WS2812B</a> LEDs each one containing 77 LEDs. I finished the design and now want to turn them on.</p>

<p>I used an old power supply to power it, but now that I am running it, doesn't work. I checked the voltage with a multimeter and it shows that I have 5 volts and it seems doesn't have any problem but the data doesn't transfer to my strip.</p>

<p>I just copy past FastLED from libraries and changed the number of LEDs. I thought maybe I am using the Funduino from school, maybe this is a problem and I need another Arduino board? </p>

<p><a href="https://i.stack.imgur.com/8YCSZ.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/8YCSZ.jpg" alt="Photo of test"></a>
<a href="https://i.stack.imgur.com/DOR9G.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DOR9G.jpg" alt="Circuit"></a></p>
 19409: <p>Are you completely sure that these are WS2812B LEDs? To read more, check out this great link from Core Electronics:<br>
<a href="https://core-electronics.com.au/tutorials/addressable-rgb-led-controllers.html" rel="nofollow noreferrer">https://core-electronics.com.au/tutorials/addressable-rgb-led-controllers.html</a></p>

<p>It is more than likely your code. Download the code from a known working example and get that working. Try using an example program such as:   </p>

<ul>
<li><a href="https://howtomechatronics.com/tutorials/arduino/how-to-control-ws2812b-individually-addressable-leds-using-arduino/" rel="nofollow noreferrer">https://howtomechatronics.com/tutorials/arduino/how-to-control-ws2812b-individually-addressable-leds-using-arduino/</a></li>
<li><a href="https://core-electronics.com.au/tutorials/ws2812-addressable-leds-arduino-quickstart-guide.html" rel="nofollow noreferrer">https://core-electronics.com.au/tutorials/ws2812-addressable-leds-arduino-quickstart-guide.html</a></li>
<li><a href="https://learn.adafruit.com/adafruit-neopixel-uberguide/software" rel="nofollow noreferrer">https://learn.adafruit.com/adafruit-neopixel-uberguide/software</a></li>
</ul>

<p>Once you have known working hardware then delve into your own code and find the problem.</p>

<p>Also check your wiring with fresh eyes. It could be something simple.</p>
