TheBackShed.com

Forum Index : Microcontroller and PC projects : SK6812 RGBW Chip Addressable LED

Author

Message

Zonker

Guru

Joined: 18/08/2012
Location: United States
Posts: 761

Posted: 05:44pm 31 Jul 2023

Copy link to clipboard

Print this post

Has anyone used this LED..?? Like the WS2811 RGB LED but adds a white section also...
It looks like the same type data protocol... Wondering if it could be worthy of being supported in an upcoming release of the firmware... Thanks for any feedback...

Edited 2023-08-01 04:19 by Zonker

bigmik

Guru

Joined: 20/06/2011
Location: Australia
Posts: 2914

Posted: 03:06am 01 Aug 2023

Copy link to clipboard

Print this post

Hi Zonker,

Glad to see you still lurk around TBS.

I havent used them but they look nice and a quick peek at Aliexpress shows many different styles and a few sizes and shapes.

The ones I particularly like are the 3.2mm square (1/8") with 4 horizontal legs that would be reasonably easy to solder onto a PCB and at around $12AU (about $8US) per 100 shipped.

I would like to see some code to support these myself. I suppose a single module could be written to in basic without the need for C, they could be good for status indicators.

Regards

Mick

Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<<

Mixtel90

Guru

Joined: 05/10/2019
Location: United Kingdom
Posts: 6630

Posted: 06:50am 01 Aug 2023

Copy link to clipboard

Print this post

You may have to use BITBANG to create a data stream as timing may be critical (as it is on th WS282 family).

That type look as if the pins don't reach the PCB for surface mounting. I'm not sure how you'd mount them without enough heat to "float" them onto solder blobs. Low temperature solder?

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

phil99

Guru

Joined: 11/02/2018
Location: Australia
Posts: 2080

Posted: 08:12am 01 Aug 2023

Copy link to clipboard

Print this post

Quote That type look as if the pins don't reach the PCB for surface mounting.

Perhaps that package is intended to sit in a cut-out so the base can touch a heatsink.

bigmik

Guru

Joined: 20/06/2011
Location: Australia
Posts: 2914

Posted: 08:48am 01 Aug 2023

Copy link to clipboard

Print this post

Hi Mick, Phil, John, all,

Yes I did miss that the pins were not flat on the bottom of the chip, but there are many different shapes out there so it was only one of them.

I will be watching where this thread goes.

Regards,

Mick

Mick's uMite Stuff can be found >>> HERE (Kindly hosted by Dontronics) <<<

Bleep
Guru

Joined: 09/01/2022
Location: United Kingdom
Posts: 497

Posted: 12:08pm 01 Aug 2023

Copy link to clipboard

Print this post

Hi Zonker,

You can very easily do it with the PIO.
Link to some PIO code to drive addressable LEDS
This code is for WS2812, but would be easy to convert it to drive any other type of addressable LEDs.
Regards.

matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 9033

Posted: 07:47am 05 Aug 2023

Copy link to clipboard

Print this post

Support added in the latest beta

Mixtel90

Guru

Joined: 05/10/2019
Location: United Kingdom
Posts: 6630

Posted: 08:04am 05 Aug 2023

Copy link to clipboard

Print this post

Yay! Great news, Peter.

Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs

Zonker

Guru

Joined: 18/08/2012
Location: United States
Posts: 761

Posted: 10:37am 05 Aug 2023

Copy link to clipboard

Print this post

Wow.... Awesome Peter..!!

I wanted to get some to play with but didn't know how to properly drive them... They seem to be the next thing to move into, so I wanted to see if anyone had used them before... Nice....

Edit: I found these small RGBW strips at Digi-Key and ordered 2 of them...

2869_Web.pdf

The Digi-Key number is 1528-1595-ND if interested...

Thanks again Peter for the update...

I assume the update is Pico firmware...

Edit:
V5.07.08b11 Includes support for SK6812 RGBW Leds
Use - BITBANG WS2812 W, pin, nbr, value%[()]
Put the white value in bits 24-31 to light the white LED. (example)
BITBANG WS2812 W, 1, 1, &HFF000000

Thanks Peter... Understood... Update when samples arrive...

Edited 2023-08-08 05:43 by Zonker

Zonker

Guru

Joined: 18/08/2012
Location: United States
Posts: 761

Posted: 04:14am 13 Aug 2023

Copy link to clipboard

Print this post

Good evening Gents...

Update, the RGBW code seems to be working...

' RGBW LED test (8 LED's)

Option explicit

Dim integer pattern1(7)=(&H00000002,&H00000200,&H00020000,&H02000000,&H00000002,&H00000200,&H00020000,&H02000000)
Dim integer pattern2(7)=(&H00000200,&H00020000,&H02000000,&H00000002,&H00000200,&H00020000,&H02000000,&H00000002)
Dim integer pattern3(7)=(&H00020000,&H02000000,&H00000002,&H00000200,&H00020000,&H02000000,&H00000002,&H00000200)
Dim integer pattern4(7)=(&H02000000,&H00000002,&H00000200,&H00020000,&H02000000,&H00000002,&H00000200,&H00020000)

SetPin gp22,dout

Do
Bitbang ws2812 w,gp22,8,pattern1()
Pause 1000
Bitbang ws2812 w,gp22,8,pattern2()
Pause 1000
Bitbang ws2812 w,gp22,8,pattern3()
Pause 1000
Bitbang ws2812 w,gp22,8,pattern4()
Pause 1000
Loop

https://youtu.be/ZMCPH4ZoI7Y

Print this page

To reply to this topic, you need to log in.