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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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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26 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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1answer
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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1answer
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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3answers
5k views

Control Simple RGB LED Light Strip With ESP-01 Using Homebridge

What I am trying to do is control a simple 2m 5050 RGB Led Light Strip though a ESP-01 that receives http requests through Homebridge. I am doing this through the better-http-rgb Homebridge plugin and ...
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2answers
119 views

Controlling RGB led strip each color with a switch

I am creating a picture frame that will have RGB led strip surrounding the frame. There is no room for controller. Is it possible to wire a switch between every color cable so I can manualy turn on ...
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1answer
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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3answers
559 views

Can you determine RGB pinouts with a multi meter?

I have a Swiftech Apogee XL2 that has an addressable LED inside it. I want to connect it to my other RGB setups but I need to know the pin signals and voltage of the LED. I have a multi-meter at the ...
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1answer
5k views

Common Cathode vs. Common Anode (RGB LED) [closed]

What is the difference in power consumption between these two RGB LED circuits, one common cathode, the other common andode?
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1answer
173 views

RGB led weird color behaviour (blue except when touched to skin)

I have an RGB LED, which I belive to be the diffuse version of this one: https://www.sparkfun.com/datasheets/Components/YSL-R596CR3G4B5C-C10.pdf, though I am not completely sure, as I bought it some ...
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1answer
6k views

RGBHV (VGA) to YPbPr Converter and Waveforms?

Purely for hobby, I am working on an RGBHV (VGA) to YPbPr (Component) converter circuit for old games consoles modified to output RGBHV on a VGA cable. From the game consoles, the RGB signal is taken ...
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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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1answer
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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2answers
251 views

Wiring an RGB led light array

I'm building a grow light using 100 rgb leds. I know that I need resistors but I don't know how to calculate which ones to buy. Also before I buy the leds I have the choice between common cathode ...
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1answer
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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1answer
728 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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2answers
56 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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3answers
711 views

What power supply do I need for my LED light strips?

My set up is this: Power supply > RGB LED WiFi controller > 1 to 3 cable splitter > 2M cable (x3) > 132.5cm 120leds/m 5050 RGB strip (x3) I contacted the eBay seller about what power supply I would ...
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2answers
2k views

WS2812B - flickering and artifacts

I have a project that has 48 various lengths of WS2812B RGB tape strips. All 12V. Here is a link to the tape i am using. datasheet I seem to have a lot of flickering at the ends and the occasional ...
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1answer
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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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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2answers
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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1answer
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
1k views

ATmega328p driving RGB LED WS2801

I am using an ATmega328p to control this RGB LED module. The ATmega is on an Arduino Uno, but I am programming it in C, without using the Arduino libraries. To power the RGB module I am also using a ...
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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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2answers
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
675 views

Use 4-pin S-video cable connector on RGB LED?

I'm hoping to make some 4-pin RGB LEDs (R, G, B, GND) easily hot pluggable, so I'm wondering if 4-pin S-video connectors could be used. Now, 2 of the pins on a S-video connector are GND, so would ...
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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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2answers
288 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
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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3answers
2k views

Issues with NPN Transistors and RGB LEDs (Common Anode)

I have a question regarding the use of NPN transistors in an RGB LED (common anode) circuit connected to an Arduino Uno. I have spent the past several months developing LED color control software that ...
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0answers
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
79 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
123 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
553 views

Correct way to wire RGB LED Strip

This is a quick and simple question but I was wondering if this was the right way to wire a NodeMCU to an RGB LED strip. I am using IRLZ44N MOSFET's and 470ohm 1/2 watt resistors. I currently have it ...
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1answer
187 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
384 views

9X9 RGB Led matrix, design suggestion

I need to drive 80 RGB leds (so 240 individual leds), physically and conceptually aligned as an 8x8 matrix + an additional vertical line and an additional horizontal line. I'd like to drive the ...
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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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0answers
53 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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0answers
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
84 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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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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