Anyuca, H.B. and Ismail , A.A. 2024. Swing Motion Obstacle Detection Warning System Design In a Swing Area Based on Arduino Uno Using Ultrasonic Sensors for Excavator. Jurnal Teknologi dan Rekayasa Alat Berat. 1, 2 (Aug. 2024), 12-16. DOI:https://doi.org/10.22146/jtrab.v1i2.11917.