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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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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1answer
44 views

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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1answer
41 views

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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2answers
65 views

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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0answers
37 views

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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3answers
78 views

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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3answers
3k views

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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27 views

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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1answer
36 views

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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2answers
72 views

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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0answers
52 views

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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41 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
76 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
71 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
52 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
175 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
159 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
93 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
75 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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0answers
76 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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0answers
38 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
89 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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0answers
52 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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0answers
38 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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0answers
62 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
167 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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0answers
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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0answers
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 ...
2
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1answer
368 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
112 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
1k 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
23 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
49 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
48 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
91 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
114 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
27 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
154 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
111 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
29 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
98 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
121 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
58 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
67 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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0answers
91 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
236 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
250 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
55 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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