Tinker Lab
Window weather station
A temperature and humidity sensor reports to a web page you can open from the sofa. It logs a reading every minute.
Projects
Three builds that each fit on a breadboard and finish in an afternoon.
Plant thirst alert
A soil probe measures moisture and shows a simple dry, fine or wet status, so the fern stops dying quietly.
Door watcher
A magnetic switch notices when the shed door opens and updates a page with the time it happened.