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Questions tagged [ws2812b]

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44 views

Flickering Neopixels (WS2812B)

I am working on a WordClock. First, I want to give you all the details needed and then I will ask my question. So, for this WordClock I used the Arduino with the FastLED library. I made a PCB (350 x ...
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0answers
34 views

How do I wire a Rasberry Pi 3B+ to a WS2812b RGB strip?

I am working on a project where I need to use a WS2812b RGB strip. I am really worried because I have already burnt 2 Raspberry Pis with my wiring. I just want to show my schematics, and be assured as ...
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2answers
147 views

Can i use I2C level shifters to power digital LED strips

Can I use I²C level shifters to power digital LED strips, more specifically, WS2812B strips? I can only find I²C level shifters, are they ok?
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0answers
39 views

I have RGB LEDs but I need an external power source [duplicate]

I have WS2812b RGB LEDs for a project but I don't have an external power source. I heard that you can use a power bank for charging phones and things. I cut the end of a micro usb but wouldn't know ...
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2answers
72 views

LED strip is flickering, but when I touch the data wire to the Raspberry Pi, it's almost fixed

simulate this circuit – Schematic created using CircuitLab Figure 2. Schematic tidied up by @Transistor. I have a Raspberry Pi which controls a 12V addressable LED strip. When the data wire is ...
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1answer
117 views

5V vs 12V addressable LED efficiency

Despite hours of googling, I could not come to clear understanding how efficiency of 5V addressable LEDs compare to their 12V counterparts. If 5V is supplied to WS2812, and the red LED only needs 2....
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2answers
70 views

Powering multiple WS2812B strips from different sources, are all grounds connected?

I'm looking to confirm if I need to connect the ground of 2 LED strips which have different power sources. Adafruit says The key is to have all of the ground pins among the strips connected in ...
0
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1answer
71 views

Raspberry PI Zero - 5VDC output current?

I was planing on using a Raspberry PI Zero W for å smart lamp project with WS2812b LEDs, to avoid separate power supply for the LEDs, my plan was to power the LEDs from +5VDC on the RPI ZW. The lamp ...
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1answer
92 views

RaspberryPi driven LED strip is flickering

Supplies: LED Strip Please note I'm trying to power 28 of them. ~1400 mA Power Supply for LEDs 5v/2A Raspberry Pi Breadboard Microcontroller I am following the adafruit for driving LEDs from the pi. ...
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0answers
153 views

WS2812b LEDs intermittently do not respond to data signal

I have wired up permanent holiday LEDs on the front of my home, using a 5V 60A power supply and several strips of WS2812b's (generic Neopixels), controlled by a Wemos D1 mini. The Wemos is powered ...
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1answer
63 views

Wiring a power supply, arduino, and LED strip together?

I've been researching various websites on all of my questions and have found answers to many of them but I am also finding conflicting answers for some of them. I've read that electricity is something ...
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1answer
224 views

STM32 cant get DMA on PWM

I wish to drive a set of NEOPIXELS (ws2812b) using the STM32F4 discovery board, so far i managed to get a 800 kHz PWM signal using the CubeMX. And And the following code: ...
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2answers
361 views

What's the name of signal encoding used by WS2812 LEDs? [duplicate]

The WS2812b color LED uses some kind of duty cycle encoding to encode three states: one zero reset This can be seen in the following figure: (Source: https://cpldcpu.files.wordpress.com/2014/01/...
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2answers
180 views

Attaching a 3 mm fiber optic cable to a WS2812 LED

I am wondering how to easily attach a side-glowing fiber optic cable (I have 3 mm here) to a cheap WS2812 LED that is flat and soldered onto a PCB (like these here). I tried with Sugru, hot glue, ...
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1answer
265 views

STM32f103 DMA with PWM repeating values

I have a Blue Pill (STM32F103) and connected to it a ws2812b led strip. I am trying to send data to the led strip via PWM over the TIM2 peripheral (Pin A0). To change the duty cycle of the TIM2 PWM I ...
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1answer
277 views

Level shifting with 74HC245 3.3V to 5V not working for WS2812b [closed]

I'm trying to drive a strip of NeoPixels/WS2812b using an ESP8266 controller. To do so I'm using an external power supply (5V/10A effectively more like 5.6V) and a 74HC245 to shift the 3.3V data line ...
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2answers
377 views

Is 22AWG wire appropriate for 144-LED WS2812B strips?

There is a question on a 1m set of WS2812B LEDs at 144 LEDs/meter (60mA/LED at peak brightness) about what gauge wire is used. The seller replies that the wire is 22 AWG (linked above). 144 * 60mA = ...
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2answers
175 views

How to make rgb LED strip digitally addressable [closed]

I'm planning to install rgb LEDs srip on each steps of stair, there are total of 19 steps and I want to control each strip individually so I need 3 for rgb and 19 for each strip that makes 57 pwn ...
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3answers
2k views

ws2812b 5050 60 led per meter 300 led strip power issues

I'm having issues trying to power my 5 meter 300 led 60 led per meter strip and I'm using the sp105e magic controller to control them. I cannot get them to light up correctly. I have a 4.5V 100mA ...
2
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2answers
193 views

Running 20 WS2812 LED strips (80 pixels each) from a single Arduino and 24V Power Supply with Buck Converters

I am building a matrix with 20 WS2812 LED Strips. Each strip is 80 pixels for a total of 1600 pixels. I want to drive them all from a single Arduino Mega board. To handle the power needs, I have a 24V ...
2
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2answers
365 views

Driving WS2812b with STM32 and PWM strange behavior

First of all I want to say that I'm a complete beginner in circuit design but I really want to do one thing. I'b trying to drive WS2812b LED strip using STM32F103 chip. Since WS2812b use 5V and MCU ...
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1answer
642 views

WS2812 ESP32 Flickering math issue

Alright, so I've searched just about everywhere to find an answer to this and I've personally experimented a lot to try and find a solution. The error I'm experiencing is Neopixel (WS2812B 12ct LED ...
2
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1answer
172 views

“light_ws2812” library 10x slower than required (AVR C, ATMega328p int. 8Mhz)

So I'm trying to run some SK6812 (WS2812 clones) on a standalone ATMega328p. The output signal is too slow! I define F_CPU as 8000000 (8Mhz), both in the code and in the Atmel Studio Symbols, but my ...
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1answer
54 views

Matrix of WS2812b powered in 24v (LEDs 5 by 5)

In order to reduce the power for a large quantity of WS2812b matrix, I would like to power it directly by 24V, by intuition, chaining in series 5 LEDs (for the power only, the data will be one by one ...
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1answer
311 views

Using WS2812b Addressable LEDs on Raspberry Pis

I am attempting to control WS2812b LEDs using a raspberry pi according to this guide: https://tutorials-raspberrypi.com/connect-control-raspberry-pi-ws2812-rgb-led-strips/ So far I executed the ...
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2answers
729 views

Ws2812B strip required AWG

I’m looking to setup 6 runs of WS2812B strips at 10 meters length each (2 rolls of 30/m each). I selected a 5v 100 amp psu and plan to power each strip by supplying power at one end and in the middle....
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1answer
512 views

ws2812b data resistor

I use an ESP32 with a 3.3v->5v level shifter to send the info to the data line of a 150 led-strip (WS2812b). It is recommended to use a 300-500 ohm resistor between controller's output pin and the ...
2
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1answer
423 views

esp32/ws2812b power issue

I'm building a little circuit to handle two 5m led strips with an ESP32. ESP32 is a d-duino-32 OLED clone you can find in ebay/aliexpress sites. Also bought a 5v 20a power supply. One path powers the ...
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0answers
102 views

Normal for WS2812B LED's to turn on immediately when powered?

Is it normal for all the LED's on a programmable LED strip to turn on as soon as power is applied? I have 3 strips of WS28182B's, and they're all behaving exactly the same way - the 300 LED's all go ...
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0answers
135 views

One-wire concept for WS2812B - adding signal onto DC

I would like to reduce the amount of lines for a string of WS2812B RGB LEDs for a project. In my understanding two lines should be sufficient, since we can modulate the signal onto the DC line. ...
0
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1answer
82 views

Level Conversion RGB LED Strip Noise Resistor (3.3 to 5)

I recently prototyped my circuit on a breadboard that controls a WS2812b RGB LED Strip. The PDIP (breadboard friendly) ATMEGA644 uses 5V logic while TQFP uses 3.3V logic. The LED strip specifies a ...
0
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1answer
59 views

WS2812B “Twitching”

I have a row of WS2812B on my PCB. I have 3 identical PCBs, and on 1 board the WS2812Bs are "twitching". They are showing colors just fine, but RGBs are flickering / twitching repeatedly. It happens ...