Bring an old turntable back to life with belt/stylus upgrades and app-powered speed tuning.
A proof of concept to customize the UniFi Cloud Key Gen2's LCD TFT black-and-white display using Python.
Have your couch tell the TV to pause when you get up for a snack, and unpause when you sit back down.
If you use UniFi for your network and Namecheap for your domains, here's a convenient tutorial on how to glue them together.
Tidy your cabling and get remote power management by using your PoE switch to power your Phillips Hue bridge.