Dual MCP23008 board assembly notes

http://www.blogger.com/blogger.g?blogID=1840459474737789074#editor/target=post;postID=1107542923531630877

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 I am assembling a dual MCP23008 board.  I am using 2 MCP23008 instead of 1 MCP23017's because it is more flexible if I am playing with devices using less than 8 IO pins.

Last time I soldered the components from back end to front end.  This time I am going reverse, from MCP20338 side to level shifter ULN2803 x 2 then to HC573.  The bad thing going this way is that I no longer have the indicator LEDs for monitoring and troubleshooting.  The good thing is that the wiring is not so messy, and I can do incremental testing easier.

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