[Nathan] wanted a smart mirror that cost less than the last one ... The most expensive piece of the build is a 7-inch monitor ($45). Any Raspberry Pi will work, although [Nathan] uses a Pi B+.

Use a Raspberry Pi to bridge smart home devices to HomeKit, even if they're not officially compatible. Run your own Minecraft server on a Raspberry Pi for control over settings and safety.

A smart mirror needs an interface ... [Tobias] initially thought to use a Raspberry Pi, but instead opted for a mini-computer that had been banging around a closet for a year or two.