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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Read and decode .led file

I'm working on a flexible LED screen persisting of 20 meters of digital RGB LED strip with WS2811 IC for each LED. I want to control this using Arduino, which isn't a problem using FastSPI. My ...
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3answers
152 views

multiple RGB LEDs with common resistors for each color

I am modifying a pcb with 9 RGB LEDs having three resistors each normally. I know that it is the proper way of doing it. However what is the disadvantage of connecting them as below? Resistors being ...
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51 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
3k views

Driving a RGB Led strip with a RGBW controller

I have a RGB LED strip (Common +) that I want to drive using a controller that expects the strip to also have a W (White) channel. So what I am basicly looking for: As soon as the controllers W ...
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2answers
170 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
52 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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2answers
414 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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1answer
68 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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3answers
3k 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
3k views

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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1answer
89 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
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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3answers
160 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

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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1answer
57 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
66 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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39 views

I have RGB LEDs but I need an external power source [duplicate]

I have WS2812b RGB LEDs for a project but I don't have an external power source. I heard that you can use a power bank for charging phones and things. I cut the end of a micro usb but wouldn't know ...
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1answer
95 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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5answers
6k views

Red Green Blue LED

Do you need to use different resistors against each of the colours on an RGB LED?
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0answers
43 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
75 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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2answers
62 views

How do I interpret an RGB LED max amperage given as a range e.g. 30mA-70mA?

I have some LED's I got in a mixed package and the RGB LEDs instead of a single max amperage just list a range. One example is I have a common cathode RGB LED with ratings listed as 1.9-3.4v and 30mA-...
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5answers
38k views

What resistor to use with this RGB LED?

i have this led, and im not sure what resistor to use to drop the 5v current to an appropriate voltage and produce the appropriate current. the LED is rated at 200mA, but the data sheet says i ...
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1answer
132 views

Series and parallel RGB LED work abnormally (cross light up)

I am trying to make a msp430 controlled Bluetooth RGB lamp. The program works perfectly right now. But the problem is: when running for a while or as soon as I connect the led driver power supply (I ...
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2answers
192 views

Power consumption NeoPixels vs. direct control?

At Maker Faire Berlin 2018, an electrical engineer looked at my project which was shown with NeoPixel LEDs (WS2811). He mentioned that the NeoPixels waste a lot of energy. It would be better to build ...
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0answers
47 views

Battery voltage indicator using a RGB 5050 LED strip

I am looking to use a 5050 RGB LED strip to show either green, blue, and red depending on the battery I want two monitors voltage. If I take my LED strip and connect 12 volts to it and then ground one ...
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2answers
110 views

Control the RGB tape with only one output of the microcontroller

I need to control the colors of an RGB ribbon. This requires 3 PWMs. But I have only one output of my microcontroller available. So for this I need to find a circuit that stays between the ...
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5answers
9k views

Why do some RGB LEDs have six legs?

Others have four legs, which makes sense to me, as ground can be shared. One of many examples of a six legged RGB LED is the Kingbright KAF-5060PBESEEVGC.
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1answer
174 views

RGBW Cree XM-L LED power circuit HELP!

I have 10 Cree XM-L RGBW LEDS and I would like to power them from a 12V power supply. I came up with this idea: A 12V 30 amp power supply powers 3 different step down buck converters (10 amps each ...
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0answers
31 views

Can I connect 2 power supplies for 16 meters LED RGB strip?

I've bought 2 sets of 10 meter LED RGB strip (7.2w/m) for a room. Then I've cut them to around 8 meters each to get 16 meters. Everything seemed fine but one thing, because it's 2 separate controllers,...
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2answers
2k views

ATtiny25 PWM LED driver with brightness control

I'll be building a piece of RGB LED jewelry for a gift. It's basically a pair of earphones with one or two RGB LEDs on each, with a small ATtiny25-based PWM driver in a small enclosure. I'll probably ...
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1answer
68 views

Spliced LED Strips with Pre-Fab Controller [closed]

I need 2 meters of high density LED strip for a project, but high density strips are often only sold in 1 meter increments. I'm thinking of buying two strips -- of one meter each -- and soldering ...
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1answer
887 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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2answers
136 views

Will this MOSFET be suitable for driving a 12V 1-2A Load from an Arduino?

I have an Analog 12V RGB LED strip (which only requires 1-2 amps at most) that I want to control using an Arduino Uno. I looked into how I could go about doing this and saw that i could use several ...
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2answers
305 views

Powering 30m of RGB LED strips?

I'm currently interested in following this tutorial which explains how to create a homebridge (ESP8266) controlled 12v RGB strip which is exactly what I've been looking for. However, whilst I do ...
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2answers
282 views

TLC5940 - with 200LEDs from car battery

I'm working on project that involves 100 white and 100 RGB leds, controlled with 25 TLC5940. I've managed to connect three TLCs to Arduino MEGAv3 and so far so good. I've found out that I have to ...
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4answers
455 views

What is the RGB value of Edison Light Bulbs? [closed]

I've been doing a little electrical engineering (outside of my lane a bit). I'm trying to get the RGB values for Edison light bulbs. Can anyone provide me with those?
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1answer
105 views

Inverting current flow of RGB LED

The board I created uses the WS2811 which outputs a 12V RGB signal, with the high signifying an inactive LED and the low being full brightness. The components connected to this receive a 12V power ...
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1answer
142 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
79 views

RGB LED Commond Anode Configuration

I am trying to create a schematic for driving two WP154A4SUREQBFZGC RGB LED diodes using ON Semiconductor's CAT3626 and here is my schematic: and here is proposed circuit from ...
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4answers
3k views

Can I replace these many capacitors with just one?

I'm designing a schematic for an addressable RGB LEDs array and I've chosen the WS2812B because of how common and cheap they are. Looking at the typical application circuit, I noticed there is a ...
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2answers
66 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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5answers
794 views

Minimizing PCB size of a 192 RGB LED array

I'm working on the design of an LED lamp house for my film scanner. I need RGB LEDs, plus IR LEDs. I'm figuring on a 2"x2" grid of SMD LEDs. Datasheets for the ones I'm using below. The current design ...
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1answer
201 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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4answers
392 views

Driving 10W RGB LED Red Channel Issue

Been a while since I have been on here but I do not know where else to turn for help! This is more of a hardware issue than anything so i do hope that I am in the correct forums to be asking, if ...
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0answers
183 views

Red divider resistors for 5050 RGB strip coming from WS2811 chip

To split up a WS2811 data signal into discrete 5050 RGB 12V LED signals, I followed the example on the WS2811 datasheet and hooked up its outputs to a separate power supply. This example shows one ...
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1answer
3k views

Converting DisplayPort to 24 bit RGB parallel. Possible?

Is it possible to interface a DP1.1 complaint source to a TFT Module that uses 24 bit RGB? I'm investigating the possibility of interfacing an Atom D2550 with This Display. I have 3 options to ...
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2answers
411 views

Li-Ion battery for RGB strip

I am looking to power up my Teensy LC and my RGB strip from the same power supply, which is a 3.7V Li-Ion battery 3000mAh. The teensy can work perfectly fine with 3.7V. The problem is when it comes ...
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0answers
32 views

Analogue Video Trace Matching

I'm working on an analogue audio, video and sync board for my Dreamcast. Something I've been wondering about is the tolerance for analogue video, specifically RGB, in regards to the delta for trace ...
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2answers
3k views

Is it possible to use a ULN2003A Darlinghton array instead of multiple TIP120 transistors?

Looking at the datasheets, I'm not sure their specifics match; TIP127 and ULN2003A My intention is to do something like this, but with the ULN2003A, that I have already: The reason why is that I ...