Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [ws2812b]

131 questions
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10 answers

Is DC 5V and 2A dangerous to me?

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 course, the idea is to not touch the terminals but…
NameIsMarcus
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2 answers

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 2.1V, will the rest 2.9 be dissipated as heat? If…
Art
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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 15A power source that I then run to 5 buck…
Dan B
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6 answers

Powering two 5 V strips using a 12 V power supply

I'm working on a lighting project for a van build out. I'm using 12 V car batteries that are solar-powered. I know that I can use WS2811 strips that are 12 V strips and power them directly off the car batteries, but I'm curious if I can instead use…
JackKalish
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2 answers

How do I safely power 2 m 144 LEDs/m WS2812B strip with 5 V and 10 A?

I am using a 2 meter strip with 144 LEDs/m on a WS2812B LED strip. By doing the maths on how much current would be required to power this we get: 60 mA * 288 = 17.28 A. However, I am not planning on having the LEDs at full brightness and I do not…
owjo
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1 answer

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 the leds. The upper ring(Brass Wire) is the…
E199504
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3
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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: /* USER CODE BEGIN 2 */ HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1); /* USER…
Bart Admiraal
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3 answers

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 works on 3.3V I use logic level shifter. Here is a…
folibis
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2
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3 answers

PCB design, 30 5 V LEDs per board (probably 6)

It's my first time designing a PCB. I had the idea to make a pyramid out of (probably) 6 same PCBs. Each pyramid would have 30 WS2812B B LEDs. Online I read that on the one side you should be concerned about the heat dissipation of the LEDs and on…
fenryhord
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2 answers

High-frequency voltage conversion (3.3V control of Neopixels)

I have repeatedly heard that control of Neopixel LEDs running at 5v requires special voltage conversion when using a 3.3v processor, as the 3.3v control input is actually out of spec for the WS2812B LED control chip. I've not personally had…
user222703
2
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3 answers

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 in close to all similar models there is one…
Jannis
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1 answer

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 becomes red. If I were to redesign the schematics…
empewoow
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2
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3 answers

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, and what would you recommend on powering both the…
Aden Rob
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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 breadboards to prototyping boards, I'm having some issue…
hmmmniek
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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). 10A because 150 LEDS of 60mA need 9A. But, 9A is a…
probitaille
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