ATMEG328P - Sensor Board

[CardCastleStudios]

 Hey, All I am building a sensor board using a 16 port RJ45 and wondering if some of the specs that I am using are correct before I send out my Board for production.

Board: 1oz Copper
Trace Size: .254mm
Power Trace Size: .5mm
GND is filled on Top and Bottom.

Power is coming in from an ATX power Supply using the 6 pin that goes to Data connection allowing for +3.3v,+5v, 12v, and GND.

I have the Schematic and PNGs of the board attached.

[OM222O]

Are the ethernet ports on the bottom edge of the PCB?
If so I'd be worried about lenght / impedance matching of those traces, seems very willy nilly and all over the shop. Also personally I'd use 30mills for the power traces.

[CardCastleStudios]

The bottom is the Ethernet jacks, the traces at the bottom of the board are leds which I didn't think mattered to much other than delivering power, pin 8 which is the top most pin for the Ethernet ports is the signal wire going into the mux. As for the other 3 mux they delegate what sensor I have plugged in based on a 3 bit truth table.

Is there a reason for the smaller traces on voltage or would that provide less interference?

As for setup, this is the second board I have done and could not really see a much more efficient way other than using a bunch more vias which many people say to avoid?