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OK, I see what you are saying. This is where my understanding of electron flow screws me up. I understand they flow from GND to +,
[...] so I assumed that they had to have gone through the entire cap and out prior to flowing into pin 20 and pin 21, but my understanding of how this actually works is not good, and this is something I really need to get a handle on, but I am struggling with it. I am having a hard time finding any resources that can explain this well.
Looking pretty good. I can answer some of your questions.The Reset button looks correct. The 10k resistor holds the Reset (pin 1) at +5V (logic high) and the switch, when pressed, takes the pin to ground (0V or logic low).
I see a net connection between pins 8 and 22 that are not connected with copper. Also there are two isolated ground pours.
Also, the trace from pin 12 to JP9 does not need to go around the end of the atmega. Just route this direct.
I see that your have a number of Atmega pins unused. I recommend adding some pads for connectors and routing these pins to the connectors. This way if you want to add some thing (sensor input or a control output you have a connect pad into which to solder a wire.
Also, the trace from pin 12 to JP9 does not need to go around the end of the atmega. Just route this direct.I know what you mean, I tried to do this originally, but I had to make the wire so thin to get it direct, that I just figured I had the space to go around, so I just did it around rather than thin.I guess this brings up a question, what is better, shorter thinner trace, or wider longer trace?
Quote Also, the trace from pin 12 to JP9 does not need to go around the end of the atmega. Just route this direct.I know what you mean, I tried to do this originally, but I had to make the wire so thin to get it direct, that I just figured I had the space to go around, so I just did it around rather than thin.I guess this brings up a question, what is better, shorter thinner trace, or wider longer trace?It depends but I prefer shorter traces to longer traces in almost all cases. If the current through the trace is low then a narrow trace doesn't hurt. Another 'trick' is to make the trace narrower only where the it needs to be. In this case make the traces to pins 11 & 12 about half their width while near the Atmega (so there is enough clearance between them) then the width you used to the connector.I believe these traces are the control signals to the servos. These would not carry much current so could be narrower.The recommendation was mainly so that you can route traces from the 'spare' pins to connector pads. If you do not connect to the 'spare' pins then your routing to pin 12 is perfectly fine.