Questions tagged [ws2812b]

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109 views

WS2812 LED Flickering

Ihave a problem. i need to solve is as fast as possible. Maybe someone here has an idea what to do. I have WS2812 LEDs. Beetween each pixel is 30cm cable. I have to drive about 150 pixels of them ...
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3answers
157 views

Flickering LED strip when dimming

I have a 5m LED strip (Ultimate Fancy LEDs) that consists has 30 LEDs per meter of WS2812B chips. Is uses a SP601E Bluetooth controller and was delivered using a 5V/6A power supply. Out of the box, ...
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3answers
87 views

Do I need to use a MOSFET to drive 60 WS281Bs?

I’m building a custom keyboard and have 60 WS2812Bs as part of the backlighting system. I’m worried about the signal integrity as I’m using an STM32 and the max current on that pin is 25mA. Do I need ...
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3answers
85 views

Individual WS2812B circuit: Do i need a capacitor?: Power distribution?

I am currently designing a Circuit that is similar to typical WS2812B ARGB strips but seperatet into modules. In the offical datasheet, there is no mention of using capacitors as noise protection, but ...
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1answer
54 views

Controlling WS2818B matrix with ATTiny85

I am working on a small LED board project. The LED board is a 16x16 panel of WS2818B LEDs; they are also known as Neopixels. Controlling these thing is a bit of a pain, and I thought I would look ...
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1answer
26 views

12V AC to 12V DC converter to power an Arduino and some WS2812B 5050 LEDs

I am looking to convert 12V AC to 12V DC to power an Arduino through the VIN pin. The Arduino will be mounted on a PCB through header pins, please see below. This is the board I have at the moment. I ...
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0answers
46 views

Keep an Arduino Nano and 24 WS2812Bs alive if the power drops for a second

Im working on a project for a pinball machine, working on a arduino controller and beacon boards to replace old filament flashers, The supply voltage to the new arduino controller and beacon board ...
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1answer
52 views

Can't get WS2812B LED strip working with PC power supply

I am an absolute beginner in both electronics and LEDs. I would like to power my WS2812B LED strip (5m, 300 LEDs) with an old PC power supply. The power supply has 600W so more than enough power. To ...
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1answer
37 views

How to select the correct CM choke?

Say I want to reduce noise on the data line for WS2812B led strips. Is it a viable option to use CM chokes to reduce this noise? According to the docs, WS2812B data speed is 800Kbs. Which I guess ...
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1answer
85 views

Can I use a ferrite bead instead of a resistor on the data wire of my LED strip?

I have a WS2812B[PDF] LED strip which I want to control with the PWM0 pin (GPIO18) of my Raspberry Pi. Multiple sources highly recommend to insert a 330-470𝛀 resistor in between the data pin of the ...
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2answers
64 views

How individual LEDs in LED strips (or matrixes or cubes) are being powered when supplied with >=12V instead of 5V?

I've been wondering about LED strips and how its individual LEDs are being powered. My knowledge about LEDs is very basic. I know they're diodes, I know they tend to draw more current than what's good ...
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2answers
146 views

How do I safely power 2m 144 LED/m WS2812B strip with 5v and 10a?

I am using a 2 meter strip with 144 led/m on a WS2812B led strip. By doing the maths on how much current would be required to power this we get 60mA * 288 = 17.28 amps. However, I am not planning on ...
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1answer
90 views

How does a ws2812b chip work?

I know what a ws2812b chip does, but how does it work internally? How can it control the led? Is there a datasheet that goes into detail?
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1answer
46 views

Adding more LEDs in the strip causes white to become red-ish

I have an LED strip with 62 LEDs. The type of the LEDs is WS2812B. I am powering them with a 5V 10A switching power supply. When I set the LEDs to white and full brightness, they look a bit red-ish. I ...
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0answers
37 views

WS2812 Strip Connector

I'm trying to buy connectors for WS2812b LED strips. I have already found the item on eBay, but cannot find it on Digikey as Digikey has a gazillion of connectors. The connector I am looking for looks ...
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1answer
78 views

Soldering WS2812B Daisy-Chain

I'm following this project. More specific Step 7: Rainbow Pistil https://www.instructables.com/Ever-Blooming-Mechanical-Tulip/ In the picture bellow. On the top left corner is how I should solder ...
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0answers
63 views

WS2812B LED strip interference with PC monitor

As post title says I think I have an interference issue between a WS2812B LED strip (98 LEDs) and my PC monitor Viewsonic VX2458. The LEDs are connected to the back of monitor in a rectangular shape ...
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1answer
278 views

Why does color of addressable RGB LED strip change when dimming?

TL;DR I have an addressable LED strip with TM1814 IC's. (So it's actually a RGBW strip. Download datasheet here.) When set to orange at full brightness, it's orange. But when set to orange at 10%, it ...
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1answer
85 views

Can I use a single large capacitor rather than multiple small?

I'm designing a PCB to hold an array of WS2812B LEDs. The LEDs are in groups of 4, with roughly 1cm gap between them, 60 total LEDs per PCB. As per the documentation recommends I add a 0.1uF ...
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0answers
34 views

ESP32 Neopixel acting strange when using dual core functionality

I have just started using ESP32 and tested dual core functionality, which works fine i.e. can blink two leds with different blink intervals parallelly. Also I've tested touch sensors, they also works ...
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0answers
44 views

ESP32 Dev Kit C - WS2812

My Components: ESP32 Dev Kit C from Az - Delivery Power Adapter 5V - 5A Level Shifter RGB - STRIP I'm using the Adafruit_neoPixel library. My programs are working fine with the LED-Strip, but every ...
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1answer
27 views

One button circuit with thyristor, controling power suply

Please forgive my lack of knowlige. I need to make circuit with one button(normaly OFF, ON while pressing) using thyristor. This circuit will be connecting and disconnecting raspberry pi and bunch of ...
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1answer
185 views

WS2812B strip glitches or flickers. What's the cause?

I've rebuilt the Project Piano LED Visualizer but I'm experiencing some issues with the LED strip that I don't understand. I'm using a 10A/5V power supply to power a strip of precisely 180 WS2812B ...
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0answers
366 views

Neopixel WS2812B signal noise

I made a stair led with 610 leds. All powered with a ATX psu. The PSU can`t deliver the 5v for the led stripe so im using for 300 of them a buck driver and for the rest the 5v ATX out. The Buck is ...
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5answers
120 views

Cheap Reliable way to convert 3.3V to 5V with a 800kHz signal

I'm looking for a cheap reliable way (production) to convert an stm32's 3.3V output to the 5V input of a WS2812. I looked at a MOSFET solution with a BSS138 but internet research shows that it is not ...
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0answers
70 views

WS2812b data over 35m line

Single WS2812b LED are connected over 35 meters (115 feets) UTP Cat. 5e cable and it's not working as expected. Getting wrong colors. Another WS2812b placed in parallel (not chained) on board close to ...
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1answer
102 views

Wiring WS2812b to power supply

I currently have am trying to power a 300M 5V WS2812b from only one end from a 5v 20A power switching supply that I got off ebay. There is about 8-10 feet of distance between the two, and I was ...
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1answer
88 views

Creating stable 72V power source

For a lighting project, I want to power 12 programmable LEDS (WS2812b or equivalent) in series, and then have 5 of these sets in parallel. Due to extra resistance, I think I need a constant voltage ...
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0answers
141 views

WS2815 noises problem

I've been trying to use WS2815 leds in my stairs, but I'm struggling with noises problem. I'm using stm32f103c8t6 based bluepill board as a controller for 18 1m long led strips. Each strip is ...
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3answers
2k views

How much current for a 5V 60 LED/m WS2812B 5m LED strip?

I'm planning on controlling a 5m 60 LED/m WS2812B chip 5V strip with a Raspberry Pi Zero W. According to the website it draws 18 watts per meter (90 watts total). What current would this strip draw, ...
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1answer
417 views

ESP32 ws2812fx BLE leds flicker and flash different colors

I am creating a device to use a bluetooth app to control the effects in the ws2812fx library on a esp32 thing from Sparkfun. It works great using the arduino serial monitor to update. But whenever I ...
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1answer
75 views

Powering 1920 leds with 32 strips of 60 ws2812b led strips each (32 meters)

I'm tring to build a led display with 32 strips of ws2812b led strips with 60 leds each. That's a total amount of 1920 leds. How many power supplies should I buy? Given the max current of 50mA per ...
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1answer
183 views

WS2812b interference and bootup behavior

TL;DR: how can a slowly rising power supply voltage on an arduino crash the WS2812bs connected to it? How can I protect a signal wire even better from electrical interference? This my question in a ...
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1answer
179 views

WS2812B custom power distribution block

I have a couple questions about my DIY LED installation. Both FUSE BLOCKS have 20 amp fuses inline each input to the main terminal which leads to the PSU, so 6 to 1, each having a fuse inline such ...
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3answers
689 views

ws2812 strips data grounding method & flickering

I know for ws2812 strips (60ppm) you can ground the data line at the far end to reduce the chance for "echos" and improve performance. My question is can you: Short the data tab to the ground tab at ...
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1answer
544 views

~150 WS2812b LED's with Pi Zero and SN74AHCT125N

I'm planning to control about 150 WS2812b LEDs with my Pi Zero and a 5v 11a power source (PC molex connector). Following this guide: https://www.thegeekpub.com/15990/wiring-ws2812b-addressable-leds-to-...
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2answers
219 views

Fixing power supply interference issue (?)

I am working on a project that involves controlling WS2812B led strips using a Teensy 4.0 microcontroller. I got everything working during the testing phase, but now, after transitioning from ...
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1answer
128 views

How to immediately turn WS2812 LED strip on after power on?

I built a table lamp with a 1m WS2812 LED strip controlled by a RPI Zero W. It has a decent power supply that outputs 5V directly to the LED strip and also powers the RPI. The RPI takes approximately ...
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3answers
100 views

What is dynamic memory?

I have an Arduino Uno and I'm trying to use it to provide data for 1200 WS2812B leds. When I tried to provide data for them, the Arduino IDE says "Sketch uses 5086 bytes (15%) of program storage space....
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1answer
304 views

stm32f1xx how to use DMA to write to TIMx CCR

I am trying to control WS2812b digital LEDs with stm32f103. I have a buffer of color values for the LED strip and to transfer them I need to write the next value to the timer's CCR every time the ...
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10answers
10k views

Is DC 5V and 2A dangerous to me? [duplicate]

I am new to electronics so please forgive me. I am looking at powering a WS2812B RGB strip. Specifically 144 LEDs/ meter. After doing some research I found that 200mA is lethal and can kill. Now, of ...
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2answers
1k views

How to invert PWM signal on STM32

I am trying to control a WS2812 LED with STM32F103. The LED is a digital RGB LED also known as Neopixel. They are controlled by sending 24 bits of color data per LED to the first LED's data pin. The ...
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1answer
332 views

Few Strip of WS2812 with 3V3

I am trying to drive 8 strips of led WS2812 (5V) with a CPU STM32F030. The output from the CPU is at 3V3. So, I used a 2N3906 connected to 5V with resistor. I've got no problem with that. Now,I want ...
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2answers
740 views

Ws2812b circuit safety with 5V 12A

i am making a arduino project using 5v ws2812b 300leds/meter. Its going to be a motion activated led strip that runs along the side of the stairs. I will be using 3.5m of the led strip so 210leds at ...
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2answers
925 views

Why these tutorials don't care about wires when using 10A with 5V to light up strip LEDS?

One popular project I want to do with my Arduino is to light up 150 LED Strip of 5 meters (WS2812B). Here is my project: So, I have a power supply of 5V 10A (ALITOVE 5V 10A AC to DC Power Supply). ...
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2answers
384 views

Powering WS2812b 12V

I have an idea to use WS2812B as animating light on some old equipment. And I have some doubt. The equipment is 12v so I want to use WS2812B directly on 12V, namely I want to use 5 WS2812b in ...
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1answer
53 views

Powering long lengths of WS2812B Pixel Tape

I've been doing a lot of research regarding powering WS2812B pixel tape. From my tests, running a 5m length of 30 LEDs per metre tape requires powering at both ends to avoid yellowing/browning when ...
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3answers
170 views

WS2812 high inrush current in big installation

I have a "big" installation with WS2813 (WS2812b successor) LEDs. The installation encompasses over 350 LEDs which should consume about 21A if all powered on, which should never happen (it's a simply ...
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2answers
232 views

How to drive up to millions of ws2812 or APA104 LEDs? [closed]

I've driven more than 2k of APA102 from a computer using a USB to SPI interface for an interactive project. Since then I've been curious how I could made the same setup for even a large pixel area, up ...
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1answer
383 views

Will WS2812B overheat because of epoxy?

So I'm currently working on a standing LED lamp with WS2812B LEDs. The length will be about 1.2m with 60 LED/m. I'm planning to cover the LEDs with white epoxy to diffuse the light and have a nice ...