I used Viola-Jones for face detection on a Raspberry Pi 2 and built a fan with servo-actuated lamellae from plywood using my CNC-Router. It almost landed me a job at a local engineering company but chose to stay in academia back then. I still have the hardware somewhere in a drawer in my workshop. It definitely was a fun project.
https://hackaday.io/project/12384-autofan-automated-control-...
I used Viola-Jones for face detection on a Raspberry Pi 2 and built a fan with servo-actuated lamellae from plywood using my CNC-Router. It almost landed me a job at a local engineering company but chose to stay in academia back then. I still have the hardware somewhere in a drawer in my workshop. It definitely was a fun project.