Greetings gentlemen, I'm back with some more questions.
I wanna make a snap-off section on a PCB to eventually remove some of the keys and I'm considering using
mouse bites rather than a V-groove as I need traces to go across, hence I have some questions in this regard.
1. Is it a bad idea and should I drop it altogether?
2. If not, how large should each hole be and at what distance from each other?
3. Should be traces shrinked across the breaking line for a cleaner cut? I usually use 20 mil for VCC and 12 mil traces for anything else and I though to halve them.
On a different topic; I'd like to understand how SK6812 works. Specifically I'd like to ask:
1. It is my understanding that they can be daisy chained by connecting one's output the next one's input. The DO of the last LED in the series should be left unconnected. Is it right?
2. They are individually addressable so, in theory, they could be used with one pin as LED indicators as one or the other could be left unlit. Correct?
3. Obviously a PWM pin should be used for them, does it matter which one on a m32u4? Any reason for choosing, say, B7 over, say, B6?
4. I've noticed that commercial LED strips have a capacitor next to each LED.
This datasheet also uses capacitors on each LED but the value is missing. What should it be?
5. How to deal with the relatively low current provided by the USB port? Say I want to underglow the board with 12 LEDs, do I need a transistor for each LED or just one for the entire series? Which transistor would I choose?
Thank you.