Questions tagged [ws2812b]
The ws2812b tag has no usage guidance.
66
questions
0
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0answers
37 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 ...
2
votes
1answer
57 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 ...
0
votes
1answer
75 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 ...
1
vote
0answers
20 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 ...
0
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0answers
30 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 ...
0
votes
1answer
25 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 ...
1
vote
1answer
34 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 ...
0
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0answers
46 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 ...
0
votes
5answers
105 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 ...
0
votes
0answers
55 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 ...
0
votes
1answer
37 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 ...
0
votes
1answer
78 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 ...
0
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0answers
85 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 ...
0
votes
3answers
374 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, ...
1
vote
1answer
168 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 ...
0
votes
1answer
53 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 ...
1
vote
1answer
137 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 ...
1
vote
1answer
76 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 ...
0
votes
3answers
191 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 ...
0
votes
1answer
162 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
130 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
votes
1answer
66 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
vote
3answers
96 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
votes
1answer
138 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
votes
10answers
7k 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
votes
2answers
527 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
votes
1answer
197 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
votes
2answers
353 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
vote
2answers
423 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
219 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
47 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
votes
3answers
126 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
votes
2answers
209 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
vote
1answer
230 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 ...
1
vote
3answers
2k 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
votes
0answers
277 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
64 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
votes
2answers
303 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?
-1
votes
2answers
507 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 ...
2
votes
2answers
3k 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....
2
votes
2answers
952 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
107 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
vote
1answer
387 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
vote
0answers
377 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
votes
1answer
115 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
1k 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
vote
2answers
920 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
votes
2answers
809 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
votes
1answer
391 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
715 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 ...
