HD108 or something else?

olewa · Feb 10th 2025

Hi, i have some sk9822 (144/m) and had only trouble with them. Starting from having 3 injection points up to "dont shine enough". So i thought i check the current situation and found about HD108. Anyone experience with that? What also comes to my mind:

1) Will they work with 5v without having multiple injection points?

2) Is there any seller in the EU? If not, which aliexpress/alibaba source is reliable?

3) Is the HD108 brighter than the sk9822 (rgb) in general or do i need HD108 RGBW?

Thanks!

Ambient_theater77 · Feb 10th 2025

i read about the HD108, its a 16 bit architecture led.

The APA102 ledcontroller runs on 8 bit architecture.

it will be a challenge to get it running, it demands you alter Pythonscript/library of the leddriver.

i have the HD107S (8 bits) and the colours are already out of this world and run on APA102 ledcontroller

with other words: yes it excist the HD108, on a Raspi? nope.

pclin · Feb 10th 2025

PR 1826 - Implemented 16Bit HD108-Leds in HyperionNG

1. No

2. Search with your browser.

3. Probably no one can answer that yet.

regards pclin

EDIT:

How many meters do you need?

How many LEDs do you use?

60 LED/m is completely sufficient for Ambilight.

I would currently use HD107S or SK6812 RGBW.

injections:

SK6812 RGBW 5V every 150 LED (300 LED 3 injections)

HD107S 5V every 300 LED (300 LED 2 injections)

pclin · Feb 10th 2025

HD108S 60 LED/m 5V

Code: Datasheet

Lumen / meter
R:132 lm G:283 lm B:76 lm

regards pclin

olewa · Feb 10th 2025

Quote from pclin

How many meters do you need?
How many LEDs do you use?
60 LED/m is completely sufficient for Ambilight.

Its a 65" OLED, so i assume something around 3.5m. Right now i use 144 LEDs/m. I have 3 voltage injections but the LEDs are barely visible. If i need multiple voltage injections, i guess i will put the power supply in the basement and get a 12V power supply + new LEDs. I use wled to control the LEDs and hyperion on a odroid n2.

pclin · Feb 10th 2025

65" approx. 4,4m

5V

sk6812 RGBW (49mA/LED) 60 LED/m 264 LEDs injections 3

sk9822 144 LED/m (20mA/LED) 634 LEDs injections 5

12v

SK6812 RGBW 60 LED/m 264 LEDs injections 2.

WLED is optimal for SK6812 good colors and brightness, HD 107S works too.

Attention! Pay attention to individually addressable LEDs.

regards pclin

olewa · Feb 10th 2025

How do you calculate the numbers? e.g. 5 injections on sk9822 when 144led/m? right now i have 80x80x142cm (LxRxT) with 3 injections, the colors are perfectly fine but its not bright enough. So guess the SK9822 is simply not made for that. Or the location of the TV is not optimal.

pclin · Feb 10th 2025

With pure Ambilight, 3 feed points should deliver a good result.

And with 144 LED/m also enough brightness.

Try the settings in the screenshot in WLED, it's the best test.

regards pclin

EDIT:

Please take a screenshot of WLED LED & Hardware setup

olewa · Feb 10th 2025

WLED is currently not running because i did not use my diy ambilight for over a year, because of the bad result. But i can remember that i configured it to use max. power (100A) so should be more than enough oomph. I did some tests, i also used a mobile phone app to let it run but it was still not really bright. Compared to e.g. the ambilight from my mom's philips TV.

I am now away for 3 weeks, will see if i can get it running again then to take the screenshot.

Unfortunately, i can not edit my last posting somehow. Seems some (annoying) restriction. I mean 100W, not 100A 5V@20A

olewa · Feb 11th 2025

out of curiosity i googled and found https://github.com/wled-dev/WLED/issues/4169 - so seems like hd108 is not (yet) supported by wled. seems like this software can do that: https://github.com/awawa-dev/HyperHDR, but seems like this does not work on esp32, so they have their own wled fork but i read nothing about hd108 there: https://github.com/awawa-dev/HyperSerialWLED

PR 1826 - Implemented 16Bit HD108-Leds in HyperionNG

Participate now!