After a couple revisions, learning what worked in terms of electronic components, and some seriously rookie mistakes, the v0.3 board that was sent out to OSHPark came back and after soldering on a bunch of parts, I tested it with the doorbell and IT WORKS!   Thank gosh.  Attached is a couple pictures of the test rig I used and the installed sequencer.  Next step is to rewire the doorbell to the button on the front door and test it in place before cleaning everything up and installing it for real.