Sharp corners radiate EMI noise, mitred corners radiate a lot less. However, many fab houses like you to use at least a copper fill in the empty areas since it means less copper has to be etched off the board, and so their etchant lasts longer before it needs to be replaced.Īre the rounded-off traces actually better as sharp edges? Should I use a copper/ground fill? Which and why?įor your circuit there is no real electrical reason to use a ground plane. Is the spacing of the board/lines to other components/side big enough? Possibly, sometimes, under some conditions. Some credits to Nick Gammon, I've used his schematics as a reference (especially on the TX enable pin, which was quite smart, using only 1 pin).ĮDIT: It's better not to use a pull-up resistor on the reset line. Would be nice to give me some credits/donation, but you can freely use it for even commercial projects. Doesn't it need any resistors? I've seen some on the RS485 breakout boards.Can I actually use the RESET pin as other functions (without changing fuse bits)?.
Should I use a copper/ground fill? Which and why?.
Is the spacing of the board/lines to other components/side big enough?.Some points of which I'm unsure, or might be a problem: I would be using SoftwareSerial since the ATTiny does not have serial (Rx/Tx). Now I'm unsure if the PCB would work, as this also is my first try in PCB design. I don't yet have the components, so I haven't actually tried it on a breadboard. I've designed an PCB and due tot the delivery times, I kinda want to order it right now.
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