Questions tagged [ws2812b]
The ws2812b tag has no usage guidance.
146
questions
0
votes
0
answers
37
views
Current Drawn from Bulk Capacitor at LED-Strip Output
I want to design a power supply (buck converter) which converts 9 V to 5 V and supplies it to the LED strip. The LED strip is a basic 1 meter long 70 LEDs/meter WS2812B strip. In my project, I want to ...
- 1
0
votes
3
answers
80
views
Reduce power consumption on 8x8 WS2812B Matrix
I'm currently working on a project where I want to control an 8x8 WS2812B LEDs matrix.
My goal is to reduce the current consumption as I want to power it using USB port of my pc.
The datasheet of ...
0
votes
1
answer
35
views
Can I use the CC/CV converter as the LED strip driver?
I have a power supply - Molex from power supply unit (5V, max current - 11A). Besides lighting there are other consumers that do not need current stabilisation. I want to power 9 ws2812b LED strips ...
- 3
1
vote
1
answer
41
views
Is brightness for WS2812B LED voltage dependent?
I understand that this would be true for any other regular LED.
The doc states that it accepts +3.5~+5.3 V.
I was wondering if it is somehow internally converted to operate at the same level as long ...
4
votes
3
answers
931
views
Did my WS2812B strip come with wires way too small for what's needed?
I bought it on Amazon, so it's pretty much a no-brand, no-specs, product, but the product page says 0.24W per LEDs and it has 300 LEDs, 72W (woa!). At 5V that would be 14.4A (double woa!).
It uses the ...
- 149
0
votes
0
answers
49
views
PCB usb powered - led and screen wiring + review schematic
I'm currently designing a PCB featuring an STM32F103CBT6 MCU. The PCB will host five different groups of WS2812B LEDs, multiplexed 22 pushbuttons, 4 rotary encoders, and additionally, a VoCore 5" ...
- 11
1
vote
1
answer
130
views
Individually Addressable LED overheated
Update (19.3.24)
I checked the LED string with a multimeter. The + and - wire of the burned LEDs are connected, whereas the new LEDs do not have a connection between the + and - wires.
I checked the ...
- 11
0
votes
0
answers
89
views
Sporadic flickering for (very) long WS2812 strips
I haven't found any information (almost anywhere, searching for weeks already) that goes beyond my research. I hope someone has a tip/idea/hint. Maybe my research helps others too.
Connected are 5120 ...
- 1
0
votes
0
answers
30
views
Christmas light driver, two wires, 24V
I've got a Christmas led chain ( a waterfall actually ) with some troubles so I tryed to look at it... it has an only two wire bus, with a DC 24V i can measure on. I read about the ...
- 893
-1
votes
1
answer
1k
views
ESP32-WROOM-32 and WLED not communicating correctly to WS2812B LED strips
I am trying to follow Youtube tutorials to run WLED (a program) on an ESP32-WROOM-32 board I purchased, to control addressable LED strips (WS2812B).
I bought a board that does not exactly match the ...
- 101
0
votes
1
answer
122
views
Is 5.4 to 5.5 volts ok for WS 2812B Led Matrix? [closed]
I tried buying a cheap LED power supply ALIDOVE BRAND. I checked the voltage without/with Arduino and the LED matrix connected.
It's always 5.5 volts but it's working in its intended purpose - a clock ...
1
vote
2
answers
134
views
IC suggestions for WS28xx like functionality for driving transistors
I'm trying to light up string lights that run off of 12v taking up 500mA.
I'm using BC337 NPN transistor to turn individual string lights on/off where all of them are connected through a DC rail of ...
- 13
1
vote
0
answers
195
views
WS2815 circuit erratic behaviour
I have been having problems driving WS2812 LEDs; the radiated emissions were too high to pass UK tests. See Radiated emissions from WS2812 LEDs
I finally bit the bullet and went for LEDs on a printed ...
- 81
1
vote
0
answers
80
views
LED strip cable and connector sizing
I'm trying to power a LED strip. It contains 140 WS2812B with 60 LEDs/m so it is around 2.3 m. According to the datasheet, the LEDs has a 60 mA current consumption. Based on the pure math its 140*60 = ...
- 11
0
votes
1
answer
70
views
Control WS2812B LEDs independently
I am using three WS2812B LEDs in my PCB and are connected in series with each other. Is there a way that I can control each LED independently rather than controlling all three together? For example ...
1
vote
0
answers
110
views
The best way to step down 12V to 5V with at least 10A current from a PS3 power supply for a WS2812B LED strip
I am new to electronics. I had a PS3 Super Slim power supply lying around, which outputs 12V up to 13 amps. Recently, I bought a 5-meter strip of WS2812B LED strip, which needs 5V, and the recommended ...
0
votes
1
answer
54
views
Lower current than specified with LEDs' calculations for power supply
I have 1 meter of this ledstripe with 144 LEDs per meter. It is specified:
144 diodes/m = 34.56 W/m
That would make 6.912 A per meter. But when I connect them and ...
- 179
0
votes
0
answers
83
views
AC adapter interfering with WS2812B LED strip
I have 2 power adaptors connected on same AC line, both grounded.
Power adapter 1:
12V DC 10 A for powering 12 V LED strips, controlled by ESP8266, IRLZ44N MOSFET used to control brightness of the LED ...
- 1
1
vote
3
answers
415
views
How to connect WS2812B strips to all show same animation?
I have a 3 meter WS2812B strip that I want to connect to a NodeMCU in a very specific way.
I want to cut the strip down to six 20 cm segments but I don't want the animations to "snake" from ...
0
votes
1
answer
111
views
Long term availability of WS2812B or any Neo-pixel
I am considering the use of Neo-pixel or WS2812B components in a project that we are planning to run for the next ten years with mass-scale production. I am curious about the feasibility of sourcing ...
0
votes
2
answers
935
views
How to power an ESP8266 + LED strip correctly?
I would like to power ~100 LEDs from an WS2812 LED strip and an ESP8266 with my power supply of 5V / 5A.
I've read a lot of tutorials and advices but I'm still not 100% sur that all my assomptions are ...
- 103
0
votes
0
answers
71
views
0.1μs delay for AT89C51
I need to follow WS2812B protocol, which requires communication with very high speed, like 0.4μs, 0.45μs, etc. Can I achieve it with AT89C51?
0
votes
1
answer
46
views
Can we use NMOS to drive WS2812
My ESP32 control circuits all use NMOS for external control. I wonder if the data control of WS2812 can be driven via NMOS?
1
vote
2
answers
254
views
Need help designing a PCB that works the same as a neopixel would (WS2812)
I am currently working on an LED clock project, and one of the things I would like to use is the SMDs found in WS2812B neopixel. I could simply use the LED strip itself, but I wanted to use a custom ...
0
votes
0
answers
119
views
Pixeldriver P9813 with HP LED driver AL8860WT - transistor/Mosfet needed?
Refering to my previous question, I want to drive a bunch of High power LED drivers (Datashsheet AL8860WT-7) With a Pixel-IC (Datashsheet P9813).
This is my concept:
My project so far: connecting the ...
- 21
0
votes
1
answer
71
views
Control WS2812x from open collector output
I have a board with digital output that is based on open collector Darlington driver (providing up to 500mA) and I want to use that output to control WS2812x LED strip.
What should the circuit look ...
- 117
0
votes
0
answers
163
views
ESP12 with WS2812B first led always stays on
I'm making a custom remote with esp12 and 3x WS2812B led, while making the main code i discovered a problem, the first led in the series always stays on when trying to execute an example NEOPIXEL code ...
- 1
0
votes
1
answer
434
views
Is it possible to connect 5v and Ground to opposite ends of ws2812b LED strip to prevent voltage drop?
I'm currently working on a LED project with WS2812B LED strips with 30LEDs/m. After a couple meters at full brightness the color gets red because of the voltage drops.
Is it possible to connect 5v to ...
0
votes
1
answer
642
views
WS2812/15 opto-isolated with 6N137 and MOSFET?
The goal
I want to isolate a 3.3 V MCU (ESP32 C3) from a WS2815-Strip but I had no luck so far. I already read these threads, because I think they're dealing with a similar problem:
MOSFET - 800 kHz ...
- 21
0
votes
1
answer
288
views
WS2812B-2020 / NeoPixel issue with random colors and brightness
I created an LED picture on a big PCB with almost 2000 WS2812B-2020 LEDs. The bottom layer is round, and the top layer is 5V and has the LED signal routes.
I use a Pi Zero with a 74AHCT125 to control ...
- 19
0
votes
1
answer
58
views
LED data integrity inconsistency issues using Raspberry Pi
My Raspberry-Pi controls 480 LED's on a WS2812b- strip. I have cut the strips into the shape of large digits and soldered these strips of 4 or 5 LED's together to create the number '8'. I then decide ...
- 1
0
votes
2
answers
111
views
Power supply parameters to be used for WS2812B addressable leds
I bought WS2812B addressable leds. LED strip has a length of 5 meters and has 144 LEDs per meter. So there are 720 LEDs in total. I want to control this strip led with Raspberry Pi. I want to use ...
0
votes
0
answers
78
views
Common-output WS2812 LED strip alternative control
I try to build an RPi controlled LED strip, however, while the Linux is booting, I still want a minimal effect on the LED strip. So my idea is that once the device gets voltage, a cheap ...
- 11
0
votes
0
answers
234
views
WS2812 LEDs with ESP32-schemantic
I have a WS2812 LED module I want to interface with an ESP32. I want to use a button and a sensor to control the LEDs.
I am not sure if the schematic is OK. Do I need a resistor for the LEDs, and if ...
0
votes
0
answers
124
views
Best approach to driving custom RGB mechanical keyboard LEDs
I am in the middle of designing a custom mechanical keyboard and have just finished the PCB schematic, but before I spend a few hours placing and routing components, I thought I might ask y'all a few ...
- 33
0
votes
0
answers
184
views
WS2812b with Wemos D1 Mini: first LED has a constant color, further ones stay dark
I'm trying to connect a WS2812b LED strip to a Wemos D1 Mini. I'm powering the strip from the 5V pin of the D1 (which is powered from USB). The data pin of the first LED is connected through a level ...
- 101
1
vote
2
answers
381
views
How to produce a perfect color wheel using an RGB LED?
I am trying to produce a perfect color wheel using a bunch of WS2812 RGB LEDs.
My current attempt is to convert HSL (H = angle in color wheel, S = 100%, L = 50%) to RGB and send the RGB to the LEDs.
...
- 111
0
votes
0
answers
94
views
What is the correct way to connect a power supply to an Arduino and LED strip?
I am working on a project with a 5 V 15 A power supply with a barrel connector.
What is the proper (safe) way to connect this to an Arduino and also power a WS2812b strip?
I can't power the LEDs ...
0
votes
1
answer
941
views
What wire rating do I need for a WS2812b LED strip?
I am looking to make my first Arduino project. I use 140 LEDs of a WS2812B strip. I've got a 5 V, 15 A power supply plugged into a breadboard that goes to my Arduino and my LED strip. I have a roll of ...
0
votes
1
answer
318
views
ws2812b + ESP32 + 2 meter wires
I have a WS2812B Led strip, and use a ESP32 with FastLED.
It works great, as long as the led strip is near the ESP32. as soon as I add a 2 meter extension cable between the esp and the leds it stops ...
- 299
-1
votes
1
answer
255
views
Fusing power injected LEDs from both sides [closed]
I am involved on a project where we will be installing thousands of LEDs (WS2812B Addressable strips) on the floor. I have a question about about fusing and if there is a more efficient way to go ...
- 21
0
votes
0
answers
130
views
How can I test WS2812B 5 m 60 LEDs/m with NodeMCU?
I bought this WS2812B 5 m 60 LEDs/m. I want to know if it works properly. I have a NodeMCU 1.0 and I recently bought a 5 V, 10 A adaptor for these but the damn thing still only lights up the first LED ...
1
vote
1
answer
124
views
Arduino USB Protection
I am an absolute novice when it comes to electronics. I want to use a PC to control an Arduino UNO clone that will in turn control a
strip of 122 neopixels. My fear is that I will somehow damage the ...
- 13
1
vote
0
answers
54
views
Ardunio Errors with ATmega644A Fastled (MCUDude Mightycore)
Good Morning,
I am trying to compile a ardunio project with ATmega664A using the MCUDude MightyCore plug in while using the Fastled library.
I have used this before with ATtiny167 with Spence Konde ...
- 127
0
votes
1
answer
731
views
Addressable LEDs (WS2815): power and data in a multicore cable
Would it be possible to use a multi-core cable to have power and data in the same wire?
I'm using WS2815 LEDs. The total current needed is 9.6A. For a cable of 8 meters, a 2.5mm wire is needed. ...
- 19
0
votes
1
answer
281
views
What's wrong with my wire connections? (LED strips only getting ~1 V)
I'm trying to make an LED strip work, with these parts:
A WS2812B LED strip (60 LEDs/m), 5V
An Alitov 5V 15A power supply
An Arduino Nano
My issue is that the strip isn't getting the 5v it requires. ...
- 121
0
votes
3
answers
195
views
Use CAT 5 cable to control LED with ESP-12E
I plan to use the ESP-12E's GPIO pin to dim a 12 V LED strip wire and control a 5 V [WS2812B] 1 panel via CAT 5.
I tried using a 10 ft CAT 5 cable to link the ESP12E pin to the DIN pin on the WS2812B ...
- 59
2
votes
1
answer
286
views
WS2812B NZR protocol at 8 MHz ATMEGA328 doesn't work
Related with my old threads, I'm trying to set up ATMEGA328 at 8 MHz, in this way I could supply to ATMEGA328 with 3.3 V. I'm trying to make it by these lines:
...
- 400
0
votes
1
answer
146
views
Noisy behaviour of multiplexer 74LVC1G157
I'm trying to use a WS2812B addressable LED with a multiplexer 74LVC1G157. The WS2812B uses NZR protocol comunication at 800 Kbps and each pixel scan frequency not less than 400 Hz.
I have test code ...
- 400
0
votes
1
answer
57
views
NZR signal and multiplexer 74LVC1G157
I'm trying to use a WS2812B addressable LED with a multiplexer 74LVC1G157. I have test code on an Arduino, and if I connect the LED to I0 or I1, the color of the LED changes, but the delay selector ...
- 400