New PCB!

The PCB's from ExpressPCB arrived, and I finally got some time to solder all the components.  If all goes well, this should be a much more stable solution.

PCB layout design

Front view

Back view.  Testing out a new logo.

The fully populated board!

I applied power and the LED came on as it should.  Voltages to the Teensy controller and the two multiplexers (mounted on the red breakout boards) is correct as well.  There's still a bit more testing to be done before I hook up all the buttons, but so far I'm happy with how it's coming together.