Questions tagged [rgb]

Short for: Red Green Blue. The primary colors in light. Mix them to create any imaginable visible color of light. Questions are typical in reference to RGB Leds, RGB Led drivers, and code related to mixing RGB light, but can include RGB Video Standard in VGA monitors.

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Using channel A to control the operation of a segmentation module

I need to write a segmentation module in VHDL where a pixel with four channels, R, G, B and A is given as an input. The segmentation is a simple thresholding operation. Since the channel A does not ...
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Driving an RGB LED Strip with an ESP8266

simulate this circuit – Schematic created using CircuitLab That's my circuit, although it's an RGB LED strip that I'm driving, rather than three individual LEDs. It works. I can PWM each channel ...
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Building a simple USB notification light

I successfully used an Arduino with the FastLED library to operate my WS2812 Ring Light. For my next project, I want to create a notification light for my PC. Instead of using an arduino, I picked up ...
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RGB LED simulation with Arduino code

In this Arduino code, I want to when press numbers from 0 to 8, my LED s respond to it. Everything is working fine from 1 to 6 and 8. But when I select 7 and my code doesn't run well and Red and Green ...
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Looking for 5mm discrete multi color LED [closed]

I want to make an electronic version of the Master Mind game as a hobby project. The challenge at the moment is to find right type of LEDs for the job. Below you ...
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ST7789 display: pins IM0, IM1, IM2, IM3 are not accesible

In a [ST7789 LCD](https://www.adafruit.com/product/3787, how do I set the IM[3:0] pins for select the MPU Interface Mode? The manual just shows the values of IM[3:0] for each interface but doesn't ...
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RGB LED driver, PWMs seem to interfere with each other

I have inherited a project from colleague that is leaving the company. This project is a RGB LED driver with three LEDs, red green and blue, that uses an Elmos E521.36 chip. Its datasheet is available ...
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WS2812B absolute max voltage

The data sheet I have from the WS2812B is found here. I can see that there is a defined operational voltage that puts it below 5.3V. It doesn't mention an absolute maximum voltage which I am ...
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Convert RGB to the composite video / S-video (math)

I used to do it in circuits with CXA1645 or AD725. But this question is not about soldering, it is about math and digital processing. Imagine I am designing the entry-level graphics processor using ...
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16 high frequency ~4khz or more pwm ESP8266

I do colorful led light near my table. I have 5 common anode led rgb strips, glued to a different places. I'm trying to develop my own rgb controller based on ESP8266, with WIFI and USB, and met a ...
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Connectors on ARGB strip confuse me

I am looking for a nice ARGB strip for a project of mine. I am quite familiar with the 3 pads concept for ground, data and power, but a lot of the strips that I'm looking into buying have multiple ...
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How to convert composite AV signal or RGB to luma (grayscale)?

As the title says- how can you convert composite signal into luma?? As we all know, composite is just what it says, composite video with grayscale and color signal combined and luma is just grayscale. ...
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Are rgb changes affected by monitor response time?

If I'm not wrong, response time on monitors just has to do with how dark or light the image is. In that case, if a monitor has a dark blue frame followed by a light red frame and response time is 10ms,...
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How data is sent to a raw TFT?

I have used TFT drivers before but now I want to challenge myself by connecting an FPGA to a raw TFT without a driver. I am having hard time understanding the basics of the signals : how RGB pins are ...
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Using an RGB TFT screen on the Raspberry Pi 4

I want to use the HT0700EI02A TFT screen on the Raspberry Pi 4 Compute Module. Raspberry Datasheet: https://datasheets.raspberrypi.org/cm4/cm4-datasheet.pdf Screen Datasheet: https://cdn.ozdisan.com/...
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2 votes
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When using multiple constant current drivers for High Power RGB LEDs, connect Vo- together? [closed]

I'm using a set of three Mean Well HLG-60A-C350AB in order to drive a string of 48 no-name high power RGB LEDs. I chose these drivers because they provide an easy way to regulate the constant between ...
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SPI PWM LED driver [closed]

I am looking for an integrated circuit that would connect via SPI to a Raspberry Pi (this should not be overly important besides 3,3V input logic and limited clock frequency). Target use is LED strip ...
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I need to find a housing connector for an LED [closed]

I am trying to find a connector for an RGB LED (Mfg P/N: LZ1-10R102-0000). I don't want to solder wires onto the board because I want to gift it to my grandparent for easy assembly and change if LED ...
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Mystery RGB LED ring from defunct Hello Sense device. Trying to make it work

I can't seem to figure out how to get this LED ring to work. It's got 4 labeled pads: GND, VCC, VIN, DO. I tried wiring DO to an Arduino and running FastLed on it but it won't light up. I tried using ...
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LED Lighting Project: Components for RGB controllable system using cree® Xlamp® Xm-l color leds

Experience: Novice, I know not to touch 220v circuits... Objective: LED lighting system for exterior trellis with controllable color, using Cree® Xlamp® Xm-l color leds. Required: What is the ...
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Does a USB port provide enough power for my LED project?

I'm not quite sure whether or not my LEDs will draw too much current. I can't put the schematic right now, but basically I'm using just using the power line from the USB 2.0 port on my board, and it ...
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9 votes
3 answers
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My DIY RGB LED panel powered by 9V battery works but certain colors like blue, white, and purple don't work

I am able to power on my LED unit here with a 9V battery. I'm using a recharble lithium 9V as well. I can't figure out why I can't get blue, purple, and white. The only colors I get are red, orange, ...
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How can I at least estimate the optical power that an RGB LED radiates given the typical parameters?

How can I at least estimate the optical power that an RGB LED radiates given the typical parameters - say luminous intensity in Candela or Luminous efficiency - from a data sheet? Assume this is a ...
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RGB LED matrix 64x32 + ESP32 powering

I'm trying to figure out what's the best way to power a 64x32 RGB LED matrix and an ESP32 WROOM 32D using both a power bank (some 18650 2000mAh 3.7V in parallel + voltage regulator) and USB C (5V 3A). ...
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Driving Smart LEDs (integrated IC) at 24V

I need the help of someone more competent at deciphering datasheets of obscure components. I am currently building an LED indoor light installation and would like to have hundreds (400-800) of ...
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How to control 400 RGB LEDs individually?

I've got a little home project that I want to start. I don't have really have any experience in this field. So be gentle. I need control up to 400 RGB LEDs individually. They only need to function in ...
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Small RGB chip identification

I seem to be struggling in locating a replacement set of LEDs for my DRL board. The manufacture is in China and will not help me out The led is an RGB chip but every replacement I have found so far ...
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1 vote
1 answer
279 views

Which of these is the correct wiring of an RGB light strip with n-channel MOSFET for Arduino

In these 2 examples, they connect the source to the gate with a 10K resistor, and both source and gate are connected to ground (edit clarification: gate connects to ground via 10K resistor - source ...
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86 views

Film over an SMD LED to change its colour?

I require an RGB white + amber LED SMD chip. Unfortunately, it looks like nobody really makes such a thing except for one seller on Aliexpress. I tried purchasing a few of these only to find their ...
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1 vote
1 answer
67 views

Determine the relative postion of a Chip to another one

For a project I want to have an unspecified amount of modules connected to each other. All of them will be controlled via a Controller. I would like to create a virtual map within the Controller, of ...
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Representing AC sine wave with common anode/cathode RGB LED

I have a AC sine/triangle wave I want to represent with single red/green LED. When positive side goes up then green light increases and opposite for negative/red light. This is pretty simple with two ...
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2 votes
1 answer
178 views

Why would an RGB LED still glow with only the cathode side connected?

The Setup I have an RGB LED controller that is mostly a black box to me (I assume it's using PWM to produce color transitions). It's connected to an assortment of common anode RGB LEDs (they're all ...
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Why GRB format for programmable LEDs?

Why manufacturers use GRB(Green, Red, Blue) format for "RGB programmable LEDs" instead classic RGB format? Eg. IN-PI55TAT RGB LED 4 pin From the bottom of Page 6 on the datasheet: Is this ...
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Safe to use series resistors for powering common anode RGB LED from single constant current source?

I have a 3-9W common anode RGB LED (https://cdn-shop.adafruit.com/product-files/2524/FD-9RGB-Y2.pdf) and want to vary each leg's voltage with PWM through FETs, namely IRLZ44Ns, and an Arduino, in a ...
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Routing Guidelines for Analog Video (VGA, RGsB, PAL)

I am currently into the design of the analog video IN/OUT. Basically I have a 3U PCB on which the encoder/decoder ICs are present, that converts the digital video to the analog RGsB (RGsB OUT) and PAL ...
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1 vote
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Resistor on data line between SK6812MINI-E and an MCU

Im getting pretty confused by the resistor that is supposed to be between the DIN of the first SK6812MINI-E and the pin of the MCU. The LEDS are being powered by a 5V 2A power supply (but should only ...
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0 votes
1 answer
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RGB 24-bit resolution on 12-bit DAC

I am looking to pass my 24-bit RGB color value through a DAC, but my resolution of the DAC is 12-bits. Would I have to reduce the resolution of each channel to fit it on my 12-bit DAC? Is there a way ...
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RGB LED voltage drop issue

i have RGB LED strip 173 LED in parallel. i am driving from 5V 10A SMPS. for R, G, B color it works fine universally light entire strip. but when i go for white color then half of the strip little ...
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0 votes
1 answer
605 views

How to properly wire a five color RGB LED strip?

I've worked with common anode and common cathode RGB LEDs either 12 volt or 5 volt using PWM mostly to change color. Usually then these products that I work with have the typical four color wiring ...
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How can I determine the correct voltage connector in an addressable LED strip?

I found a couple of cheap Addressable RGB strips laying around and they seem to have a different connector that won't fit in the current PC ARGB controller. I cannot identify what type of ARGB module ...
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1 vote
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Angel Eyes RGB LED Ring Light Wiring Extension

the cables aren't long enough and I want them to be black. Can anyone please tell me what this type of wire is called? It has four very small cores and runs on DC12V to supply power to four of these ...
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2 votes
1 answer
681 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 ...
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207 views

Power supply whine noise

I built an RGB LED strip controller with a Wemos D1 mini, using this schematic: On the phone I have a color picker and just roll over it and the LED color changes accordingly, but sometimes I hear a ...
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What's the best power injection method for addressable LED RGB Strips? [duplicate]

I'm currently working on an outdoor LED Strip lighting project, and as I'm not particularly experienced with electronics, I wanted to confirm whether my current plan/components have any issues that I ...
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Consistency Concerns Between Series RGB LEDs in a String

My concern/question: If one has a string of series RGB LEDs (w/ independent elements) and was to light green to 100% and red to approximately 75% -- in an effort to illuminate the Amber color -- how ...
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1 answer
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Connecting 2 identical led RGBW controllers with 12V led strips same length into a 24V Power supply [closed]

Ok, some bad decisions took place and now i am stuck with no money and: 24V 8.33A power supply with 2 channels. Magic Home 5V-12V-24V RGBW wifi Controller 192W max (got them from here) 15m of 12V ...
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What are the maximum number of RGB LEDs that can be hooked up to just one of these I2C RGB LED Drivers?

So this is LP5036 by TI (Datasheet), a 36 channel RGB LED driver I2C interface-able with a micro controller, which means it can drive upto 12 RGB LEDs individually up to my understanding. But using ...
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130W fixture containing 160 RGB LEDs - what LEDs could they be?

I apologize for this very stupid question, but I'm diving head-first into electronics and I am sort of confused. I'm hoping some experts' answers will at least give me more terminology, concepts, and ...
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LED RGB how it works

I am working with an RGB LED. For my project I need just green and red light but I don't want to add two separate diodes cause they need to be at the same place. I don't have so much space on MC so I ...
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Addressable ICs similar to WS2811 for monochrome LED [closed]

For my home decoration, i want to individually address the led strings . Since one string is of a single color, i need an ic with serial communication similar to WS2811 ic but monochrome to control ...
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