Strings of serial addressable LED's, but only white - Page 1
Forum section: electronics / beginners

author: PinheadBE
author_rank: Regular Contributor
timestamp: September 27, 2019, 07:18:14 pm
content: Hoy,Does anyone here have knowledge of the existence of a kind of LED-chip, in the same kind as a WSxxx or APAxxx (thus serially connected and addressable), but only in white (WW, and as a Nice-to-have, tunable to CW).The ideal would be a LED strip ready to use (since I do not want to assemble 50 meters (estimated) by myself).The idea is to have a small indoor architectural lighting that could be controlled to illuminate some areas more than others depending on some presets (TV evening, Friends gathering evening, Work environement ...)The 50 meters (estimated) is explained by the fact that I would place one string illuminating the ceiling and one other parallel string illuminating the wall and slightly off to the center of the room. Everything would be mounted on an aluminium profile that could serve as a cooler, and that would also hide the power wires behind it)I am not so much interested in the choice of color for this project (don't want to turn my living room into a dance floor, except between CW and WW), but if there's no other way, I would use full color WSxxxx strings.Any ideas, suggestions are welcome.Thanks a lot

author: darrellg
author_rank: Unknown
timestamp: September 27, 2019, 08:42:54 pm
content: Adafruit sells them. For example:https://www.adafruit.com/product/2436. Check the website for other color temperatures, lengths, and densities.

author: Kasper
author_rank: Frequent Contributor
timestamp: September 27, 2019, 11:49:21 pm
content: Sparkfun has them in 3 shades of white:https://www.sparkfun.com/products/13898Can probably find them on alibaba for much cheaper.

author: PinheadBE
author_rank: Regular Contributor
timestamp: September 28, 2019, 10:32:10 am
content: Thanks guys !I hope I'll find them at a Chinese reseller, because 20 $ per meter...

author: kjr18
author_rank: Regular Contributor
timestamp: September 28, 2019, 10:51:18 am
content: Try looking at SK6812. These are ws2812 compatible and in many different variants, for example white-warm white-amber.

author: PinheadBE
author_rank: Regular Contributor
timestamp: September 28, 2019, 11:38:24 am
content: Right ! I found those at 16 $ for 2 meters (but for a naked strip; not sure that the best option for longetivity)Anyway there are tons of sellers on Aliexpress to search.Thanks for having put me on the right track

author: Kasper
author_rank: Frequent Contributor
timestamp: September 28, 2019, 04:44:43 pm
content: Try iPixel for the LEDs on Alibaba.

author: Kasper
author_rank: Frequent Contributor
timestamp: September 28, 2019, 05:19:39 pm
content: Quote from: PinheadBE on September 28, 2019, 10:32:10 amThat was the cheap '3 wire' type in medium pitch (60 LEDs / m). There are also '4 wire' which are easier to control and 144 LEDs / m if you really wanna spend $ or 30 LEDs / m for cheaper.If you don't want to control each LED individually then adressable strips are a bit overkill. You could get non addressable strips and dim them with LED drivers (cc (constant current) power supplies). That would probably be cheaper, easier and more relibable. If you want multiple shades of white or other colors then lay multiple strips beside eachother.Each driver controls a strip with how ever many LEDs you want and all the drivers can be controlled by a MCU or wall mounted dimmers, etc