Chagrin:
harleydk:
Another thing I need to learn from you is in how you hook up your capacitors - am I reading your schematic correctly, in that C8 is only connected on one leg? Is this what you mean by saying ' You can always leave the spaces unpopulated', which I didn't really grasp?He has a ground plane which isn't visible. The side that appears to be unconnected is actually connected to GND in a flood fill.
With respect to "leaving spaces unpopulated" I'm referring to not adding the part in the final circuit. For example, if you just wanted to run your 328 at 8MHz using the internal oscillator then you'd leave the spaces for the crystal and capacitors "unpopulated".
Correct, C9, C10, C11 and several others are the same way, connected to the ground pour. Here are images of the top (red) and bottom (blue) copper that may clarify things a bit. This is a multi-purpose board and was designed with the idea that several components would be optionally installed, depending on the ultimate purpose of the board.
