302: IV Curve Tracer

The ability to analyze the current-voltage (IV) characteristics of electronic components is critical for researchers, educators and engineers. Understanding these characteristics helps design reliable circuits and ensures proper functionality. We aimed to develop a compact, user-friendly IV Curve Tracer to simplify this process while maintaining accuracy and affordability.

We built the device around an Arduino microcontroller, paired with a custom circuit board and software for data acquisition and analysis. It measured voltages from -4V to 4V and currents up to ±100mA with high precision. A 3D-printed case protected the components and provided portability. The overall system of the IV curve tracer worked with a PC and Keysight’s oscilloscope for enhanced functionality. Additional features included data storage, transfer and the ability to compare IV curves across multiple components.

Our design incorporated customer needs such as safety, accuracy, affordability and ease of use. The system used power regulation circuits to generate stable voltage and current outputs. We looked at the important parts like the microcontroller, power regulators, and precise measurement tools during our functional breakdown. We explored multiple concepts during the design process, balancing cost and performance.

The IV Curve Tracer served as a reliable tool for analyzing electrical components, benefiting educators, students and professionals alike. Standalone usage that didn’t require the oscilloscope would allow better mobile transportation; this would be the next step for future works. Its modular design allowed for future scalability and integration into various applications.