Build a Raspberry Pi-powered computer
There are a few builds out there for making a Raspberry Pi-powered computer setup, from the quick and easy to more expert-level projects. This one by Michael Davis for an all-in-one desktop computer is on the easier end. It has a short list of needed materials and lets you put an old monitor and keyboard to use. The Raspberry Pi gets strapped to the back of the monitor, letting it go incognito.