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SK6812MINI-E Logic Voltage #3

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jyancat opened this issue Jul 22, 2023 · 3 comments
Open

SK6812MINI-E Logic Voltage #3

jyancat opened this issue Jul 22, 2023 · 3 comments

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@jyancat
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jyancat commented Jul 22, 2023

In https://github.com/FrameworkComputer/InputModules/tree/main/Electrical/MicrocontrollerInputModule there is a SK6812MINI-E RGB LED driven by 3V3 logic, while this probably will work it's not optimal, better to add a level shifter (up to 5V logic) or note this in the folder readme.

@cscott
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cscott commented Jan 24, 2024

The datasheet specifies that VIH is "3.4V typical" so yeah, this is technically operating the SK6812 out of spec.
Screenshot from 2024-01-24 18-31-26

@cscott
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cscott commented Jul 10, 2024

A 74LVC1G34GW would be a compact solution.

@JohnAZoidberg
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this probably will work

You're right, it does work :D

This really is just a quick and dirty reference that's not supposed to be used for anything and also supposed to be as simple as possible.
We made a couple test boards to see if it works, but nothing more.

So if you could make a PR to add a level shifter that would be great.
Otherwise I think we'll just add a comment to the README noting that the design is functional but perhaps not optimal.

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