The WorldSemi WS2812B RGB LED has been revised with new silicon (date codes from 2017), and an unannounced change that is breaking current code has happened: the reset time has gone from 50 microseconds to 300 microseconds according to the datasheet. There is a visible difference between the parts:
The difference between the old and the new controller IC is apparent: the old one is rectangular whereas the new variant is square.
Here is a page from the updated datasheet:
So in order to get these to work the new minimum reset time is 300 microseconds, check your code!
Thanking Vladimir Pantelic for the information,
Join 5,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord
CircuitPython in 2018 – Python on Microcontrollers is here!
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/
Maker Business — A journey through Shenzhen, the electronics manufacturing hub of the world
Wearables — Ice, ice baby
Electronics — Current limiting!
Biohacking — Grindfest 2018
Python for Microcontrollers — CRICKITs are coming!
Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com
No comments yet.
Sorry, the comment form is closed at this time.