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Questions tagged [rgb]

Short for: Red Green Blue, the primary colors in light. They can be mixed to create any visible color of light. Questions are typically in reference to RGB LEDs, RGB LED drivers, and code related to mixing RGB light, but can include the RGB Video Standard in VGA monitors.

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3528 RGB LED common anode but + on pin 1

I have a gaming controller (nacon; mid tier) which have 3 damaged LEDs. They are 4 pin RGB LED 3528 size in common anode. But the positive common is on pin 1 (the LED marked pin) and all the LEDs ...
jetuaime81 's user avatar
1 vote
3 answers
159 views

Why are these RGB grounds connected to the signals?

This is part of the schematics from an old arcade cabinet. The RGB signals all have distinctive grounds that seem connected directly to the signals cable. How is it possible? There is a video ground ...
Chris Nuvoli's user avatar
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2 answers
85 views

Understanding safety concerns with RGB modding hot-chassis TV

I'm in the US. I'd like clarifications on the safety of RGB modding an old, hot-chassis TV. I know it's not economically viable but I'd like to learn. While researching how to do this safely I ...
lwiseman's user avatar
  • 103
1 vote
1 answer
85 views

Audio visualizer: What can I improve in this circuit?

Being a beginner in electronics, I embarked on designing and building a sound visualizer, turning bass, mid, and high frequencies into red, green, and blue light in an RGB LED strip. I designed the ...
Matthias's user avatar
  • 169
1 vote
1 answer
42 views

Can a shift register be used to drive LEDs that need to be pulled down to light up?

In my limited experience I have only used RGB LEDs that have a common anode connected to ground and then are lit up by pulling up on the pin connected to the LED colour pins. I currently have 3 ...
EwneoN's user avatar
  • 13
1 vote
0 answers
93 views

Can I use a handheld spectrophotometer to calibrate my TCS3200-based fluid color assessment system?

I'm trying to build a system that measures color and turbidity within the tube that exits a patient's brain. Using a TCS3200 sensor and an Arduino micro, and a custom-made housing to ensure a dark ...
Bilal Bahadır Akbulut's user avatar
3 votes
2 answers
312 views

Why the LED heats up and fails to pass the controlling information further?

Intro I'm designing my own macro keyboard with 3x5 rows of RGB-LED backlit buttons and two encoders. I use SK6812 (WS-2812B-like) mini RGB LEDs to backlight the buttons. TL;DR After turning on the ...
Spook's user avatar
  • 199
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1 answer
50 views

Design RGB Strip with WS2813 on 24 V?

I am in the process of designing a PCB with RGB LED's. I wanna control them with NeoPixel. And it has to be supplied with 24 V. Right now for reference (see picture) I have a LED strip with segments ...
Jesper Egsgaard Nielsen's user avatar
2 votes
1 answer
48 views

Which type of male header can connect to PC addressable RGB LED connectors? [closed]

I need to find the right connector, solderable on the surface of a PCB, that can mate with the cable shown in the picture below. This type of cable is commonly used of addressable RGB LED fixtures (...
DavGin's user avatar
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0 answers
80 views

Sporadic flickering for (very) long WS2812 strips

I haven't found any information (almost anywhere, searching for weeks already) that goes beyond my research. I hope someone has a tip/idea/hint. Maybe my research helps others too. Connected are 5120 ...
cakepi's user avatar
  • 1
5 votes
2 answers
688 views

RGB digital to analog converter

I am seeking help to design a small PCB that can translate digital RGB like Neopixel to analog signals for driving high current LED RGB. I know it's a bit weird. I would like to connect to a board ...
Jesper Egsgaard Nielsen's user avatar
1 vote
2 answers
317 views

Why my 12V RGB LED strip controlled by Arduino Uno has reversed colors and when I set RGB to 0,0,0 (after reverse) strip should be black but its red?

This is scheme: Transistors: BD912, PNP, 15A, 100V, 90W, TO220. And this is color of "black": and this is code: ...
Adamoss's user avatar
  • 11
0 votes
1 answer
83 views

Feeding multiple analog video channels onto a common bus - signal integrity issue?

Consider the following simplified schematic: The intention here is to have multiple analog video input channels selectively coupled trough an analog switch onto a shared bus (this bus will be on a PCB)...
nonius's user avatar
  • 97
3 votes
1 answer
82 views

Fluctuating brightness in RGB-LED strand controlled by Arduino

I am controlling the three colors of an RGB strand using PWM output from an Arduino UNO (via IRF520N MOSFETs). When the signal to the LEDs is in midrange, the strand starts to visibly pulsate at a ...
Matthias's user avatar
  • 169
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1 answer
50 views

Identify this LED strip and suggestions for controllers

I am trying to find how to use this LED strip. If you can find anything about this please suggest me some controllers. Please refer to these photos. I found this while cleaning the house. It has two ...
Lime's user avatar
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1 vote
0 answers
162 views

WS2815 circuit erratic behaviour

I have been having problems driving WS2812 LEDs; the radiated emissions were too high to pass UK tests. See Radiated emissions from WS2812 LEDs I finally bit the bullet and went for LEDs on a printed ...
srlevitt's user avatar
1 vote
0 answers
204 views

Addressable RGB LED 'curtain' - how are parallel strings addressed?

I bought a cheap LED curtain device.. its 20x20 fully addressable LEDs. Its pretty nifty, and now I want to make one myself. (in fact, I want to eventually make 20 x 20 x 20 ... but let’s learn to ...
Charlie CheeseCake's user avatar
0 votes
1 answer
63 views

Control WS2812B LEDs independently

I am using three WS2812B LEDs in my PCB and are connected in series with each other. Is there a way that I can control each LED independently rather than controlling all three together? For example ...
Zunuran Nasrullah's user avatar
2 votes
1 answer
108 views

Can't find a ARGB PCB Connector

I'm building a board to which I want to connect ARGB peripherals - strips, fans, etc. I have stumbled upon a big problem - I can't find those 3 pin connectors anywhere. Regular pin strips don't work - ...
MustSeeMelons's user avatar
0 votes
2 answers
71 views

Wireless Keyboard RGB backlight design

I am designing a split wireless keyboard with a 3.7V 2000mAh LiPo battery and using the BQ24075 for power management. I'm contemplating the use 32 of the SK6803 Mini-E for backlighting. Is this ...
ElectronicGlitch's user avatar
1 vote
2 answers
107 views

RGB LED Selection and Perceived Brightness

I'm trying to design a smart light with 800-1000 lm white LED strings (warm+cool) and RGB, but I'm having a hard time comparing the luminous intensity or sometimes mcd ratings. How can I select red, ...
Dan's user avatar
  • 133
-1 votes
1 answer
63 views

Can the 5V and the 12V rail on a PC PSU share the ground pin? Proprietary -> standard ARGB fan connectors

I use 6 PC case fans which I want to get out of their proprietary 6pin connection. They are made by the budget fan manufacturer Asiahorse and connect to one of their hubs right now. But the topic ...
Amanahumpa's user avatar
1 vote
4 answers
387 views

Issues driving 3W RGB LED (common anode): Can't light all 3 colors at once

I hate asking advice somewhere that I can contribute little so trust when I say that I have logged many, many hours researching this.. have watched every relevant video on YouTube I can find, every ...
Outbak Jak's user avatar
0 votes
1 answer
99 views

LED : Multiplexing : Color-mixing (RGB)

With a single RGB (red-green-blue) LED, if: Enabling the colors non-simultaneously (via multiplexing or a similar form of PWM), At a frequency which is sufficiently-high to make flicker indiscernible,...
kando's user avatar
  • 437
0 votes
1 answer
115 views

Driving a 3x3 RGB LED matrix using programmable IC

I am looking to build a 3x3 RGB LED matrix with individually addressable LEDs as a form of user interface. I do already have a micro controller available but want to use it only as high level ...
mkirche's user avatar
1 vote
1 answer
1k views

Can addressable 5 V LED strips be powered with two differently strong power supplies?

I want to power 16 m of SK6812 RGBWW LED 5 V strips with 60 pixel/m. They are rated with 18 W/m which would make the maximum power ~300 W. I highly doubt that I will ever use the full power so, 200 W ...
PowerStrugle's user avatar
1 vote
1 answer
204 views

Use the interal framebuffer of a display driver IC (here: ST7789V ) in RGB mode

I have an embedded RTOS system driving a display with ST7789V over uC's RGB565 interface. To save RAM, it would be nice to avoid the typical double buffering by having only one framebuffer in the uC ...
Philippos's user avatar
  • 192
1 vote
1 answer
500 views

DALI 209 DT8 RGB color commands

I know how to send DALI comands to change the temperature. It is done by sending to following commands: ...
Maximilian's user avatar
0 votes
1 answer
142 views

High-power LED driver

What would be the best way to drive 3 high-power RGB LEDs with one 18650 battery? The LEDs are 3 W a piece. Forward voltage is 3.2 V, forward current 350 mA per color. I would like to use a mini RGB ...
Matthew Whitlow's user avatar
0 votes
1 answer
84 views

RGB LED strips in series

I have 3 RGB LED strips which are controlled by an infrared sensor input. The way they are working right now is that there is one 12 V, 3 A adapter that powers one LED strip. I have connected all 3 ...
talhamasood0000's user avatar
3 votes
3 answers
576 views

How to manage MOSFET spikes in low side switch switch

I've seen lots of questions here about various spikes/overshoots/transients when using MOSFETs but when I try to apply the solutions to my circuit I can't seem to apply them in a way that makes much ...
superN8's user avatar
  • 97
0 votes
0 answers
53 views

How can I test an LCD with an RGB port?

I want to test this LCD. When I connect its power, the message "no signal" appears on the screen. How can I send a simple signal to it for testing?
Kiani's user avatar
  • 21
1 vote
1 answer
154 views

RGB Hub using MUX and PNP

I have 2 RGB controllers that I am trying to connect through a multiplexer that will be controlled from a GPIO pin on microcontroller (Seeed Xiao SAMD21) so I can freely switch between the controllers....
superN8's user avatar
  • 97
2 votes
0 answers
287 views

How to convert VGA to RGB?

I have an LCD screen whose connector does not have a synchronous pin (according to the photo). I want to connect a laptop to it through the VGA port. Can you help me?
Kiani's user avatar
  • 21
0 votes
0 answers
222 views

Addressable RGB lights on a battery

I'm working on a DIY project making an RGB tube light or wand. My concern is how I can run an addressable RGB strip on batteries. Things I have; A one metre strip with 144 pixels on it that needs 5V ...
Shaikh Shajaa's user avatar
0 votes
3 answers
180 views

Creating an even, color mixed field from an array of RGB LEDs

I'm working on a lighting application which requires a very even, well mixed field of light. I'm using an array of RGB LEDs to generate the light, and then using a piece of opaque plastic to diffuse ...
flimsy's user avatar
  • 362
0 votes
0 answers
109 views

Can't read RGBC data from TCS34725 RGB Sensor using AVR and Atmega16

For my project, I need to read the RGBC data from a TCS34725 RGB Sensor using the Atmega16 and AVR. It should be able to classify between the colors Red, Green, Blue and Clear light. Therefore I made ...
nowsqwhat's user avatar
0 votes
2 answers
597 views

PWM RGB LED strip with IRLZ44N

So this is part 3 (or 4 depending how you look at it) in a series of questions I've had around PWMing an RGB LED strip from an ESP8266 (check my question history if you desire). I apparently keep ...
OdinX's user avatar
  • 831
0 votes
0 answers
89 views

What could cause intermittent flickering in a RGBIC LED Strip?

I have a 5m RGBIC LED Strip (specifically this one), cut and connected (using this set) with wires of less than 1.5m length in total. Generally everthing seems to be fine. Colour, brightness, segments ...
Shade's user avatar
  • 1
0 votes
1 answer
344 views

Arduino PWM MOSFET LED strip driver

First off, my electronics knowledge is really basic. I learned some at school and very simple projects with Arduino. I'm a scale modeler making a specific diorama with LED lighting. I'm trying to ...
PSedney's user avatar
0 votes
0 answers
58 views

How to isolate an I2C Bus from its controller for large RGB strip projects?

Last year I controlled my RGB, 5v (not 12v) strips with a Raspberry Pi. The Raspberry Pi was powered separately from the lights via a 5v barrel supply. Everything worked mostly ok. Some erratic ...
Liam Kelly's user avatar
2 votes
2 answers
649 views

How can front- and backporch in TFT displays be inexact?

Today I had the question as to why front- and backporches in TFT displays can vary. There is this image (from https://www.youtube.com/watch?v=hnzhK5Vvvao) which shows the HSYNC, HBP, Active Width and ...
SkryptX's user avatar
  • 123
1 vote
1 answer
128 views

Getting AV video from RGB or VGA or HDMI [closed]

Which is the simplest option? In order to get Composite video with NTSC/PAL video we will use a CS5213 to convert HDMI to VGA, then use some resistors to get Composite video with NTSC/PAL. Then I ...
FSA's user avatar
  • 13
1 vote
3 answers
397 views

WS2811 IC Supply Current

There are ten RGB LEDs and ten WS2811 ICs in my circuit. I'm trying to find out how much current the WS2811 IC draws from my 5 V supply. No information about supply current is given in the datasheet. ...
Kris888's user avatar
  • 11
1 vote
0 answers
139 views

DotStar micro LED run at 3.3 V

I am designing a Binary Coded Decimal watch which uses DotStar micro LEDs for the watch face and an ATtiny1616 MCU. I want the watch to run off a Li-ion battery, but I am stuck on this circuit since ...
AWESDUDE COOL's user avatar
0 votes
0 answers
369 views

RGB LED Color Calibration to D65

I am trying to determine resistor values to set the forward current per color of an RGB LED. I would like to achieve approximate D65 (daylight white) when all LED channels are driven at maximum ...
usman510's user avatar
-1 votes
2 answers
211 views

Inductive load turns on PC mouse RGB

I have a floor fan connected on the same outlet as my PC. When the PC is off, if I turn on or turn off the fan the mouse RGB lights up for a split second. The mouse is plugged in to a USB port that ...
Infinity98's user avatar
0 votes
1 answer
275 views

LED driver resistors

I'm designing a circuit using an LED driver that is intended for RGB LEDs and uses a resistor to set the current for the constant current supply. On the LED datasheet, each color is tested at ...
usman510's user avatar
0 votes
0 answers
89 views

ESP 01M LED circuit

I designed a small LED board using an ESP 01M. At first, the 5mm LED was working as I wanted. Sometimes the processor was reset, so I plugged a capacitor into the inputs and outputs of the AMS1117 and ...
buccno's user avatar
  • 23
0 votes
2 answers
201 views

Why does pixel binning remove colors and provide monochrome image only with CMOS color cameras?

Some industrial cameras (astrophotography or microscopy) offer a hardware digital "binning" feature. Indeed, sending uncompressed 10 megapixels x 3 RGB bytes per pixel x 30 frames per second ...
Basj's user avatar
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