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ATMEG328P - Sensor Board
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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?
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