An electronic engineer, salmec, has designed an autonomous robotic lawn mower named Mowerino. The DIY gadget uses an Arduino Mega 2560 board alongside 3D printed parts, with all instructions published by salmec on Hackster. The device has many innovative features, including an anti-tipping sensor and ultrasonic obstacle detection.
https://www.notebookcheck.net/Engineer-designs-the-Mowerino-an-Arduino-based-DIY-robotic-lawn-mower.615391.0.html