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DOTSTAR color sequence of individual parts is different than
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DOTSTAR color sequence of individual parts is different than

by galengs on Wed Jan 10, 2018 4:13 pm

We purchased a DOTSAR strip, and also some individual DOTSTAR parts (Adafruit PN 2343). The color sequence is different.
The strip follows the datasheet (Shiji Lighting APA102C). The sequence in the programming details for an LED frame is "Global | Blue | Green | Red."
For the individual parts, the sequence is "Global | Red | Blue | Green." We took some closeup pictures of the parts, and you can see that the LED emitters are in different positions that match this discrepancy.

We contacted Shiji Lighting and they claim they have not build any devices with this anomalous sequence. I have the following questions:
1. Has anyone else observed this?
2. Can someone at Adafruit check their inventory and see if the individual parts are the same or a different sequence from the strips?
3. If we order more 2343 parts what are we going to receive? Are they going to change again?

Any help is greatly appreciated!
Attachments
DOTSTAR_strip1.jpg
DOTSTAR_strip1.jpg (62.05 KiB) Viewed 177 times
DOTSTAR_2343_individual2.jpg
DOTSTAR_2343_individual2.jpg (57.86 KiB) Viewed 177 times
DOTSTAR_2343_individual1.jpg
DOTSTAR_2343_individual1.jpg (58.4 KiB) Viewed 177 times

galengs
 
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Re: DOTSTAR color sequence of individual parts is different

by galengs on Wed Jan 10, 2018 5:23 pm

My second strip photo didn't get posted, so here it is.
Attachments
DOTSTAR_strip2.jpg
DOTSTAR_strip2.jpg (73.72 KiB) Viewed 167 times

galengs
 
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Re: DOTSTAR color sequence of individual parts is different

by galengs on Wed Jan 17, 2018 8:04 pm

Hello? <wave> I would really appreciate knowing if this is typical, and if I can not depend on the color sequence being the same from one lot to another. It will cause great heartache for our production folks. Thanks!

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Re: DOTSTAR color sequence of individual parts is different

by adafruit2 on Wed Jan 17, 2018 10:49 pm

hiya, yes the color order of the dotstar chips has changed when we moved to using SK9822. its been a few months since the change - APA was unable to produce good quality pixels. right now we're only selling SK9822, do you by chance have the packaging the LEDs came in?

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