Pool Controller
Combo Garage Door/Irrigation Controller
SPI code for adafruit display.
For the irrigation controller, I added a small display on the box so I could do a few operations without needing to connect to the controller from a PC or phone. The snippet of code needed to interface to the display in 9 bit SPI mode is shown here.
Grandfather clock with one octave of chimes
Android interface.
For all of these projects, I used the AndroWish project to provide a android app interface. AndroWish with the latest versions of Android no longer allowed me to access the AndroWish libs externally, so I integrated the apps directly into AndroWish. I also found the the android developer kits to be more hassle than just directly creating the apk using a script. See the above page for details.
In the works... A monitor for the AC compressor. Had a capacitor failure that probably could have taken out the compressor. Circuit breaker did not trip even with the compressor in locked rotor. Plan is to monitor current in the compressor using a hall effect sensor and disable the contactor if a fault is detected. (This got built, details will come later)