Electronics > Beginners
Creating controller for LED display, help / review needed
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muktupavels:
Thanks! Data-sheet also says 1k. :)
Lt_Flash:
No worries, otherwise looks much better and professional! But I didn't check it thoroughly as I'm currently not at home :) Maybe just cover 3V3 output of the regulator with polygon? Till the middle of capacitor, as that's your primary 3V3 joint.
Lt_Flash:
Also it may be a good idea to add a lot of thermal vias around and under voltage regulator for better thermal performance.
Lt_Flash:
Just one more thing, I can see you've got a 5V trace running from connector, why don't you flip C7 upside down and then create a solid polygon for 5V rail? Just a thought, though. In regards to 3V3 rail - you often have different cover of the polygon over capacitor contacts, like at C1 or C5 - it's just a tiny 10mil trace, actually, even though you have a whole huge polygon next to it. Just cover the half of capacitor with that polygon everywhere, right to the middle of each cap, not the way you have it - different for each capacitor, that'd be good. Otherwise - seems good to me. Polygons can be optimized a bit, but nothing to be stressed about.
Lt_Flash:
Here's a good video from Dave about bypass caps and where to place them, just for information.


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