PCF8574 Lives!

Well after spending a couple hours beating on it, turns out I had done the address jumpers backwards on the board.  So solder the dip switch as normal with "On" at the top, then flip it over to address it.  Here's a quick and dirty addressing table:

PCF8574AT:

A2	A1	A0	Address
0	0	0	56 (38h)
0	0	1	57 (39h)
0	1	0	58 (3Ah)
0	1	1	59 (3Bh)
1	0	0	60 (3Ch)
1	0	1	61 (3Dh)
1	1	0	62 (3Eh)
1	1	1	63 (3Fh)

The soldering is a bit messy as I had removed several components (including the PCF8574) while troubleshooting the addressing problem.  However here are the pics of MoboControl and the board connected to a fan.

Messily soldered board...

...and we have lift off!

I2C PCF8574 Board and Parts are in!

Just got back from some fishing... and had a nice surprise waiting for me. Both the boards I had ordered and my ULN2803s I had ordered from Hong Kong arrived.  Since my wife badly wants to go to a game tomorrow, she's cooking dinner so I can play. :)

Top of the board

Bottom of the board