Rune Kyndal turned his 1990s era plamtop into a functional Linux machine jamming a Teensy LC, USB hub, and Raspberry Pi Zero W into the small space created by gutting the original electronics.
The HPi95LX (get it? Pi?) crams a 4.3″ 800×480 color LCD (up from 240×128 monochrome!), stereo speakers and USB mic, two USB ports, a full-size Ethernet jack, DE-9 RS-232 serial, and more into this diminutive form factor.
The Teensy is connected to the keyboard membrane to convert it to a USB keyboard for the Pi. Read more on the project’s Hackaday page.