Design & Fabrication of Digital Angle Gauge using Arduino Nano

Accurate angular measurement is a critical requirement in various engineering and scientific domains, including robotics, structural analysis, and biomedical instrumentation. Traditional mechanical angle measurement tools, though reliable, suffer from limitations such as wear, backlash, parallax error, and a lack of real-time data integration. This paper proposes the design and development of a compact, digital angular gauge leveraging the Arduino Nano microcontroller and MPU6050 accelerometer module. The system translates tilt orientation into realtime digital readings with high sensitivity and low latency, displayed via a 0.96" OLED screen. The proposed design ensures miniaturization, cost-effectiveness, and robust performance, making it suitable for portable or embedded applications. The developed system was tested under static and dynamic conditions to validate linearity, repeatability, and accuracy, and results showed a mean error of less than 0.5° compared to reference instruments. This paper details the theoretical background, system architecture, calibration strategies, and validation procedures, establishing a new paradigm for affordable digital angle measurement.