November 2005


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11.08.2005: "Hardware Layout"

Ok, quite a bit of work has been done lately in the hardware realm. I've gone through 2 iterations of board layouts, the first of which was fairly simple and mostly a test. The second layout, uses a 2 layer design, has everything on ICs (including resistors) and uses the proper pin-outs for the output to the XEM3001.

Barring any significant errors in IC size (as I have yet to find the corresponding IC size for the resistor packs and AD8564 comparators) and finding the exact size ribbon output to the XEM3001, this layout should be ready for work. I'll need to get with someone who's used layout more than me, to find out what I need to do to essentially finalize the layout. The other thing I need to check, is to see if I can make a Vcc and Ground plane, or at least just a ground plane so that everything has ample access to ground. The layout program did a few interesting things with the ground wires because it assumed that it was just another "Network" and not specifically the ground. It did this despite that "Network" being specified as ground when it was originally made in PSpice.