Update 2019 - Abandoning as these have become available commercially at a much better price point than when I originally started this project.
Raspberry Pi internet-enabled cat feeder using the PicoBorg Reverse.
I wanted to have a way to feed my cats while I am out of town, so I started this project. A Raspberry Pi is connected to a PicoBorg Reverse which is then connected to a battery pack and a 125oz. stepper motor. The stepper will be connected to a dry food dispenser to turn the handle the specified amount (currently 1080 deg for normal and 2160 for "large") or attempt to unjam the feeder. Please note that I do not recommend opening this up to the internet quite yet unless you want to have the whole world feed your cats (or worse).
Links to things I've used in this project:
Raspberry Pi Model B - http://www.raspberrypi.org/products/model-b/
PicoBorg Reverse - https://www.piborg.org/picoborgrev
Sparkfun NEMA 23 125oz. stepper motor - https://www.sparkfun.com/products/10847
Zevro WM100 dry food dispenser - http://www.amazon.com/WM100-Indispensable-SmartSpace-Wall-Mounted-Dispenser/dp/B0009MGQUC
Sparkfun 4xAA battery pack - https://www.sparkfun.com/products/12083
Sparkfun 1/4" x 4" D-shaft - https://www.sparkfun.com/products/12165
Sparkfun 1/4" to 1/4" shaft coupler - https://www.sparkfun.com/products/12251
Topcoat - http://topcoat.io/topcoat/
To Do: [ ] - Add a live(ish) stream to monitor hopper, bowls, and cats [ ] - Fix logging to write to a location readable by the web server [ ] - Make the web interface not as ugly [ ] - Write up mounting instructions (still designing)
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