Questions tagged [ws2812b]
The ws2812b tag has no usage guidance.
51
questions
0
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3answers
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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 ...
-1
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0answers
35 views
WS2813 weird noise and blink led behavior after power supply power off
I am connecting my 1m 60 led WS2813 led strip + esp32 to a 5v 30A power supply (which i bought in past for other project). The led strip is working fine but when I power off the power supply, the ...
0
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1answer
41 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-...
1
vote
2answers
67 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 ...
0
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1answer
60 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 ...
1
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3answers
87 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....
0
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1answer
44 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 ...
12
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10answers
6k 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 ...
0
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2answers
123 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 ...
0
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1answer
79 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 ...
0
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2answers
135 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 ...
1
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2answers
138 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). ...
0
votes
2answers
93 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 ...
0
votes
1answer
44 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 ...
0
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3answers
93 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 ...
0
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2answers
192 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 ...
1
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1answer
118 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 ...
0
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0answers
37 views
Powering (WS2812B) LED strips through USB 3.1 GEN 1
I bought a new motherboard and it says it has USB 3.1 GEN 1 on the back panel. I did some research and apparently, USB 3.1 GEN 1 has the same power output as a USB 3.0 port which is 5V/1.8A. I thought ...
1
vote
2answers
728 views
Is it good to wire WS2813 LED strip DI and BI together?
I have so far only worked with WS2812 strips and understood, that the WS2813 have a backup data line. But how do I connect the first LED to my Arduino (acts as a controller)?
Many tutorials said I ...
0
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0answers
170 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 ...
1
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0answers
52 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 ...
0
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2answers
200 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?
0
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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 ...
-1
votes
2answers
264 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 ...
1
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2answers
2k 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....
1
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2answers
478 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
votes
1answer
88 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 ...
1
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1answer
277 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.
...
1
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0answers
272 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 ...
0
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1answer
90 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 ...
2
votes
1answer
691 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:
...
1
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2answers
501 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/...
0
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2answers
555 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, ...
0
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1answer
329 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 ...
-1
votes
1answer
459 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
1k 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 = ...
0
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2answers
379 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 ...
0
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3answers
4k 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
votes
2answers
280 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
votes
3answers
833 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 ...
0
votes
1answer
1k 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
votes
1answer
272 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 ...
1
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1answer
96 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 ...
1
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1answer
362 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 ...
-1
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2answers
1k 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....
-1
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1answer
880 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
votes
1answer
565 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 ...
0
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0answers
124 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 ...
0
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0answers
175 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
98 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 ...
