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PCA9685 LED Driver maximum brightness dips #329

@stephenhensley

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@stephenhensley

I noticed this a while ago, and I guess totally forgot to make an issue. Just want to be clear this is not new or related to the minor change in #327

It seems like when an LED is set to its maximum value it actually dips in brightness a little bit. I first noticed this on the Daisy Field, but I have since noticed it on a few custom boards as well.

I haven't really had a chance to investigate it yet, but it can be fairly noticeable in certain settings. So I want it to be documented.

I suspect it might be the result of having the on/off times being super close to each other. I don't recall experiencing this issue with old pre-daisy PCA9685 code that I have, but it's been a while since I've looked at the differences between what we have now and some of my 2-3 year old C drivers.

@TheSlowGrowth have you noticed this behavior on your end as well? I know you've used this led driver quite a bit as well.

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