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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22 views

RGBW LED Strip Project. Which Power Supply and Controller to choose?

I wanted to put up a LED Strip on my ceiling to get additional lighting in my room. So in order to get not only RGB colours, I wanted to purchase these RGBW strips: 2x 5m RGBWW 4in1 12V LED Strip ...
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40 views

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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1answer
74 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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1answer
70 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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1answer
49 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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3answers
170 views

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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1answer
153 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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1answer
84 views

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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2answers
66 views

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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51 views

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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23 views

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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1answer
76 views

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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47 views

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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36 views

Finding a lower-power WS2812-like RGB pixel (or identifying the one I have…)

I'm looking to build an application with some WS2812 or similar addressable RGB pixels. Since this will be battery-powered, I'm planning to run these pixels at low-brightness most of the time. However,...
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61 views

Is it possible to control the color of 50-100 RGB LEDs using an ESP32?

I'm wondering if it's possible to control the color / brightness of 50 - 100 RGB LEDs using an ESP32 If so what is the wiring? These would be 4-pin RGB LEDs that are common anode where the voltages ...
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1answer
69 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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29 views

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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34 views

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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1answer
179 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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1answer
94 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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1answer
714 views

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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0answers
48 views

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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1answer
21 views

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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1answer
43 views

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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1answer
47 views

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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1answer
82 views

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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2answers
88 views

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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0answers
26 views

Can One hook up several displays on the same RGB parallel interface?

I am working with a 800*480 24-bit parallel RGB LCD display. The required clock for the RGB interface has to be between 23 and 27 MHz (typ. 25 MHz). For testing purposes, I need to display "...
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2answers
109 views

I'm using four batteries with a total of 6 volts, but the lightstrip only needs five. How would resistance work? [duplicate]

The strip uses .5-2A and 5 volts. I'm using four AA batteries, so the voltage becomes 6. What do I do to reduce the voltage, and get the right current? Will the strip itself just draw the current in ...
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1answer
109 views

What type of capacitor do i need for this delay?

I installed a set of LED RGB foot-well lights on my truck. When they turned on, they have a small half second glitch before staying constant. I believe that this is because the LED RGB controller ...
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1answer
26 views

Arduino RGB ledstrip control 2 separate power supplies

Please ignore the 2 green and orange lines in the middle and consider the transistors to be IRF mosfets instead. First of all looking at the setup on the picture: is there any issues with using 2 ...
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2answers
79 views

Designing a Arduino based circuit to power standard and RGB LEDs

I am very new to the world of circuit design and would greatly appreciate some feedback on this circuit I made. It is based on an Arduino Pro Mini and its purpose is to illuminate nine 2V, 20mA LEDs ...
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2answers
102 views

Using one Mosfet to control the gate pin of another Mosfet

I am using Mosfets to power an RGB LED light strip with a Raspberry Pi: https://www.sparkfun.com/datasheets/Components/General/RFP30N06LE.pdf The I though the threshold voltage for the above Mosfet ...
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1answer
55 views

How would I switch between either of my two outputs into one input?

I am trying to design a circuit which will switch between two RGB outputs into a CRT TV's neck board. Each of the two outputs has three pins. I have tried using the 2N3906 PNP transistor, and it works ...
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1answer
66 views

Here is a design for a RGB color mixer. Is it fine, or did I mess up somewhere? Is there room for improvement? [duplicate]

LED strip has resistors built in. LED strip runs on 0.5-2A. LED Strip needs 5v, has one pin for that, one for red, one for green, and one for blue. I will be using a total of 4.8 volts. Using ohms law,...
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1answer
21 views

Why is 3-chip forward current less than 1-chip in RGB LED LTRBR37G?

Why is the forward current of 3-chip operation less than forward current of 1-chip operation? (Page 3 of datasheet.) https://dammedia.osram.info/media/resource/hires/osram-dam-6751107/LTRB%20R37G_EN....
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62 views

Best wire gauge for an RGB video signal

I'm trying to wire a CVBS-to-RGB converter into my car's monitor that only supports Navigation Maps with an old-fashioned ...
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1answer
157 views

Circuit to control an RGB LED strip using potentiometer sliders to change colors

The idea is to control an RGB LED strip (or strips, though independent control of the various strips is not necessary) lighting my desk. I'd like to build 3 potentiometer sliders into my desk to allow ...
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2answers
201 views

PWM-controlled RGB LED is flickering when PNP transistor should be off. Any insights why?

I am trying to control an RGB LED (with common cathode configuration) with a BC327 PNP transistor. The LED is powered by a 5V line. The base of the transistor is controlled by a BC548 NPN transistor ...
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1answer
46 views

RGB LED Resistor Value and Source Voltage

I am using a Common Anode RGB LED in my project(datasheet is given below) and the different specifications for each LEDs are giving me headache. In my schematics, as shown below, I have used ...
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1answer
312 views

POV display possibility with ws2812b neopixel strip

I am trying to build a full RGB POV display. Unfortunately I purchased a neopixel strip (ws2812 144/m), and lately found that its data transfer rate is 800khz that is actually less for POV display. It ...
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2answers
405 views

Design review - RGB LED color mixer using PWM

I'm trying to make an RGB color mixer. LED strip runs on 0.5-2A. It has internal resistors. LED Strip needs 5v, has one pin for that, one for red, one for green, and one for blue. Each LED module that ...
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1answer
68 views

5 m, 5 V LED strip 20 A PS = Fire?

I've got a 5m LED RGB strip to go up the stairs and will be programming it with arduino. eBay link. They state 60 LEDs/m @ 18 watt/meter, thats 3.3 W per LED? It says current rating of 3 A, so that ...
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0answers
64 views

RGB Illuminated Potentiometers

I'm currently designing a circuit using Alpha RV141F-40-20BL-B50K Potentiometers which feature a clear shift into which a 3mm LED can be inserted. My initial plan was to just fit a WS2812B ...
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106 views

Best practice to switch on 4 power supplies from one single source

First of all, I am a self taught maker with a passion for LED lights. So far I have built a few display signs for indoor applications, where one microcontroller is connected to a number of RGB Led ...
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1answer
46 views

Purpose of divide-by-2 (or CLK/2) on a video pixel clock generator ICs

I've been looking into some video clock generator chips and almost all of them have a divide-by-2 or CLK/2 output pin (in addition to the normal CLK out). What would be the purpose or application for ...
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2answers
91 views

Problems with controlling a RGB-LED

I wanted to control a RGB-LED with my RaspberryPi. The Problem is that my LED is a bit strange. The long lead is positive and the shorter leads are as usual for red, green and blue but have to be ...
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1answer
2k views

RGB LED strip presets controlled by a switch via 2-pin connector

First, I apologize if my terminology is incorrect. I am out of my element, but trying to figure this out. I bought a cheap PC case in Korea, and it included an RGB LED strip on the front of the case ...
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1answer
161 views

Wiring of SMD RGB LED

How should I proceed with the design of this RGB LED and what does this wiring diagram imply? I haven't made a design with RGBs before, so the wiring diagram from the RGB Datasheet puzzles me. My ...
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0answers
120 views

RGB to YPbPr (YCbCr) conversion and bright picture issues

I'm working on a specific RGB to YPbPr (component) converter. It is supposed to connect old consoles to a modern flat 240p supportive TV. However I have an issue with luma Y output part. Here is the ...

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