I have a few projects going at any one time, here are a few!
Using cheap cellphone-type acceleration sensors to attempt to detect earthquakes. Many of my other projects take advantage of the serial read python code I worked on for this.
Designing a 3d printed case and custom touch-based software for a Raspberry Pi camera
Using the mlx90640 thermal camera on different hardware and displaying the output quickly.
Monitoring temperature, humidity, light, and other stuff out at my solar panels (or another random location) with 900mhz radio.