Electrical Engineering

Questions tagged [rgb]

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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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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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38 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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28 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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29 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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57 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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79 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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53 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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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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20 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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41 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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43 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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73 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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57 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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22 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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80 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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104 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
24 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
63 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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89 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
48 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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64 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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59 views

Help needed for driving 160 nos - 1.5W RGB SMD LEDs (5074 footprint)

I'm a planted aquarium hobbyist and have been making DIY led lights with 3W LED chips (white and other colour leds in 4 separate channels) driven with meanwell LDD dimmed with arduino. However ...
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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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44 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
82 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
125 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
38 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
190 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
289 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
67 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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54 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
44 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
75 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
737 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
85 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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95 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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3answers
106 views

Driving RGB LED using GPIO

I am trying to drive this RGB using the GPIO of STM32F072. The GPIO can source around 25mA and the LED consumes around 20mA. Would there be any issues?
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225 views

Why can the IS31FL3731 only handle 32 RGB Leds when it can handle 144 Regular ones?

I am looking at using the IS31FL3731 IC in a project soon, but I am confused as to why the data sheet says that the circuit can only use 32 RGB LEDs when it can use 144 regular LEDs. The data sheet ...
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2answers
91 views

TFT RGB LCD construction and

I am trying to understand the construction of an RGB TFT LCD that has brightness control in it. I could not understand how does the TFT color LCD pixels glow? Does each of the pixel has its own light ...
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47 views

Is there a physical (electronics) difference between Hue White and Color and Hue White Ambiance bulbs?

I'm curious if anyone knows if there's a physical difference between a Philips Hue White and Color bulb, which allows the user to set a complete range of RGB colors including white light color ...
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116 views

How to convert arcade RGB video (2-5v p-p) to VGA (0-0.7v)?

I'm trying to convert arcade video signals (JAMMA) to VGA specifications. From what I've gathered, arcade video signals aren't standardized. They can range from 0v-2v or 0v-5v, etc. However, VGA ...
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1answer
68 views

Arduino RGB spectrum problem

Over the last few days I've been working on an anode RGB LED in Arduino, I've tried getting it to do an RGB spectrum but all I would get is just the colors from red to green, then it would get stuck ...
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97 views

30 Meter in series LED SMD 5050 60 led/m 12v RGBW

I want to run 30 meter Led length in series in a room on the ceiling. LED specifications (according to the supplier:) LED Type: 5050 RGBW LED Light Strip Quantity: 60 LEDs / Meter Working Input ...
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Why can't RGB or bicolour LEDs produce a decent yellow?

I have several different RGB LEDs and bicolour red/green LEDs, from different suppliers. I find that, with the appropriate resistors, they can produce a perfect orange and cyan; and a barely ...
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112 views

Using WS2812b LEDs in series [closed]

I'd like to convert some of my PC case fans to be compatible with Corsair's RGB system to fit with other case fans. Corsair has an RGB fan hub that allows you to connect RGB fans to it, then connect ...
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1answer
82 views

Power multiple parts of one project from one wall wart

I'm building a project with a high-power 10W RGB LED controlled by PWM from a microcontroller. Right now I'm using a wall wart to power the LED, and powering the MCU through my computer's USB. My ...
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2answers
344 views

RGBS sync signal

How are the hsync and vsync signals encoded in the sync signal in a 15 KHz RGBS? I'm trying to view an old 8-bit computer with RGBS on an VGA monitor through an RGB to VGA converter. As it displayed ...
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131 views

NeoPixel THT: Varying pinouts [closed]

I am in the process of designing a PCB for a solder kit that receives NeoPixel type LEDs, the ones with the short head: Now, there seem to be different pinouts: Ordered on Amazon.de as WS2811 LED ...
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2answers
165 views

Best way to power LED strip (180 LEDs)

I'm assembling this addressable RGBW LED strip setup that is 3m long and 60 LEDs/m. I have found no answer to my two questions on other sites or youtube. (This is the strip I'm using: https://www....

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