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Static discharge #75

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SteelBattalion opened this issue Dec 1, 2021 · 3 comments
Open

Static discharge #75

SteelBattalion opened this issue Dec 1, 2021 · 3 comments

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@SteelBattalion
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Over the time I've owned my dactyl I've noticed occasionally the led's will flash and multiple keys will become active. This can be a problem as it activates several predefined os keyboard shortcuts. I noticed that when this occurs on re plug in of the keyboard sometimes a few keys will remain in an always active state on the left half/non-arduino half. Some searches on line produced similar issues with the ergodox split keyboards. Static build up resulting in unresponsiveness or random keyboard behavior and potentially mcu death. I'm testing adding a diode to the mcp's ground connection. This should prevent the left hand portion lock ups I'm experiencing assuming that static is traveling through ground into the mcp. Has anyone else experience this behavior?

@SteelBattalion
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Adding a diode to the mcp ground helped keep the left hand side from becoming the problem, however the right hand side was still having issues. as I'd made a cable from two different pieces I had access to the ground from the teensy to the pc. I installed a diode in there as well. Let's hope this works.

@SteelBattalion
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The diodes appear to have helped. I can still see the static charge happen as whenever it did happen I would notice my indicator lights would flash, but now I don't get the key activation as it can only go in one direction I guess. I was able to replicate the issue by touching another device accidentally (small transistor) and then grounding myself on the pc chasis. At those levels it appears to have exhibited the same behavior as pre diode install.

@SteelBattalion
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Meh still doing it seems a bit more resistant. Sometimes only the led's flash, other times it still sends key commands.

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