clock E-Paper Clock (2025): I built a clock using an E-Paper display. It uses Raspberry Pi Zero 2 W and a 3D printed case.

I made this into a Kickstarter project.
kindle Kindle Clock (2025): I built a clock using a Kindle.
robot-barber Robot Barber (2025): I built a hair cutting robot.
hexacrystal Hexacrystal (2022): I designed and 3D printed a board game.
hexacrystal Water Computer (2022): I designed and 3D printed a water-powered computer.
thermostat Raspberry Pi Thermostat (2016): I connected a Raspberry Pi to control the heater in my apartment.
baka Baka Analytics (2015): I used a Raspberry Pi to track hamster wheel rotations: blog post 1 and blog post 2. RIP Baka.
compass Compass Belt (2013): I built a belt that vibrates on the side facing north.