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adafruit / Adafruit-Eagle-Library

Slowly building up a collection of parts we use here ... This file includes some library parts from microbuilder.eu Most of 'em are either Eagle parts that I've changed a little to make them easier to solder, some are 'handmade' and a few are from microbuilder.eu Its released into the Public Domain - that means you can do whatever you want. We'd like it if you kept the author email/url in the part description, just so we can be alerted if there are errors. Enjoy!
http://www.ladyada.net/library/pcb/eaglelibrary.html
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WS2812B3535 footprint incompatible with datasheet #42

Open rohinkumar opened 5 years ago

rohinkumar commented 5 years ago

The LED3535 package from WS2812B-Mini (the so-called neopixel mini) with 3.5mm x 3.5mm footprint PCB footprint seems to be incompatible with the datasheet. The silkscreen notch line (apparently pointing pin 1) causes some confusion with LED notch which represents "GND". Also, the naming of pins is a mismatch if we put the LED on the footprint. If we rotate the pins it matches with datasheet, but the footprint is not suitable to keep the LED on top. I am not sure which one is correct- your footprint or datasheet. Please clarify the same.

mattncsu commented 4 years ago

I think the footprint might be for the SK6812 3535 chips that they sell as mini neopixels (https://www.adafruit.com/product/2686). The footprint is incompatible with true WS2812b-mini (http://www.normandled.com/upload/201607/WS2812B%20Mini%203535%20LED%20Datasheet.pdf) chips. It is misleading that they put it as an alternate package under the WS2812 in the library. Just got harsh reminder to always check footprints from online sources and 30 PCBs to practice hot air rework techniques with.

nardev commented 4 years ago

I had same problem, the pads were in different sides.

nardev commented 4 years ago

p.s. if you don't want to make new libs, i think that this one would fit properly: https://github.com/lionello/Lio-Eagle-Library