I'm sure this has been asked many times before. I looked around and didn't find a discuss, at least one that made any sense to me.
I'm a serious hobbyist (background and work - physics and OS internals with some hardware experience) who is routing his first complex PCB. Routing a simple 2 layer board seems obvious to me. The board I'm routing now is a bit complex and although it uses through hole parts I need the board to small... and it will be a 4 layer board.
I've studied the literature and searched around and for the life of I must be missing something before I cannot figure it out.
For this discussion let's assume that the signals are one the outside and the power and ground planes are in the inside:
layer 1 - top - signals
layer 2 - power
layer 3 - ground
layer 4 - bottom - signals
The layers are arranged like this - (1*2)+(15*16) - a via can go from top to power and from bottom to ground.
I'm using through hole parts. I want those parts to go through the four layers but not touch layers 2 and 3.
Conceptually I would run signals on top or bottom routing them from pin to pin. When I need power or ground I plant a via and route one or more signals (on top or bottom) to the via. Now all of the parts are connected and all power and ground pins are connected.
If I'm reading this right, Eagle 6 has no supply layers, I need to create a polygon on layer 2 and 3 and name them. One of them should be GND? The other should be what??
How do I name layers 2 and 3?
What, if anything am I missing?
Thanks ahead of time,
mark
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