Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [ws2811]

37 questions
7
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1 answer

LED-driver board with WS2818/WS2811 and PT4115

I want to develop a board with a WS2818 IC and three PT4115 as high current LED drivers. Input voltage shall be 12-18V. You can easily mount a Wemos D1 Mini ESP8266 board on the top edge, as the pins are in the right positions. The output current of…
Spatz
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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

ESP32 - Level Shift - WS2811 LED Strip - Data Signal

We are working on a new project in which we have designed and prototyped a new custom PCB to include an ESP32 in which we are controlling a WS2811 12VDC LED strip via Bluetooth. I am the business owner trying to manage the project, not the…
MKAL
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2
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1 answer

2 meter data cable to rgb LED

I need to run a 2 meter data cable from an Arduino UNO to a series of 40 RGB LEDs with integrated WS2811 drivers. What kind of cable do I need? Do I need something between the cable and the first rgb LED to "clean up" or enhance the signal? The 2m…
Erik
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2 answers

Driving WS2811 LED strip from microcontroller

I'm planning to drive the input of a WS2811 based LED strip (total approx 450 LEDs) from a microcontroller/arduino, as per the diagram below. Do I need a transistor, buffer or anything else between the microcontroller GPIO and the WS2811 DIN? Or can…
steve cook
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1 answer

Impedance matching resistor for ws2811?

I want to design a circuit using ws2811 on page 5 of the datasheet It says "To prevent the reflection and hot-swap protection, we suggest to connect a 33ohm resistor at the data input or output port for impedance." But on modules and boards on the…
ahmadx87
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Animating 3600 neopixels with RPi is slow

I have SPI RGB led strip with three wires connection: – TX1818 driver (manufacturer says “it’s compatible with TM1812, UCS1903, SM16703, WS2811–2815”) – 12V, 9.3 W/m, 5060, 60/metre – 3600 pixels, 60 lines, each 1 metre long with 60 pixels – each 4…
asvetly
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1
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ws2811 lights flickering when powered with 12v but 5v works "okay", suspected PWM interference

Disclaimer: Not an EE, I just write code, so apologies if terms are wrong. Video demo of my issue here !!epilepsy warning!! My Setup I have several strands of ALITOVE ws2811 12v leds connected in series that I'm using for christmas lights. A…
Stephen
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1 answer

Driving EL wire like a WS2811 LED

I'm thinking about driving EL wire as if it were a ws2811 LED for convenience of integration with actual ws2811 LED strips. The idea is that the WS2811 Red channel acts as the enable/control input for a EL wire driver IC. I'd like to drive ~1M of…
Peter Mitrano
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1
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1 answer

Knowledge requested for WS2811 Based RGB LED driver Module

Design of LED Module based on WS2811 LED driver IC (Only Red-channel is shown). To the right of the schematic you will find a simple, cheap and robust constant current LED driver. The current for the connected LED(s) can be easily adjusted with R4…
Harry Viet
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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 add the BLE code the led signal becomes unstable…
user1166412
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WS2811 LED Strip Driver

I'm in the process of designing a LED strip driver using a WS2811 chip and 3 MOSFETs. I've attached the schematic below. I based it on the reference circuit in the WS2811 datasheet (link), and this breakout board from Freetronics (link to…
Murray484
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Arduino Uno only lighting up 3 of 8 LEDs in WS2812 Strip

I have an Arduino UNO driving a 8 x WS2812 strip but only the rightmost three of the strip are lighting up. The UNO should be able to deliver current for more than 3 WS2812s. That previous link states a 200mA max on Vcc so I should be able to see…
N Klosterman
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2 answers

Driving high power LED using WS2811 or WS2801

I want to use either WS2811 or WS2801 to drive high power LEDs with spacing between LEDs up to 15 meters. These are going to be used outdoors or in a water feature. As you know WS2811 output is constant current but WS2801 output can be constant…
ahmadx87
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WS2811 MOSFET driver - components help

I'm trying to build a board capable of driving 12 V, single-channel, non-addressable strips with the WS2811 protocol for my project. In my case I want to be able to safely switch up to 5 A (but most times way less). I've found two interesting boards…
AleMonti
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