Article Details

Abstract

To address the common drawbacks of conventional development boards, including excessive size, functional redundancy, high cost, and complex assembly requirements, this paper presents the design and implementation of a low-cost, miniature development board based on the STM32 microcontroller. The board adheres to the ID-1 (credit card size) standard and employs a modular architecture comprising a core board and an expansion board, thereby achieving an optimal balance between compactness and expandability. The hardware design, including schematic capture and two-layer PCB layout, is developed using the JLCEDA platform. A solderability-optimized layout strategy is adopted to ensure signal integrity while substantially improving assembly efficiency. Measurement results indicate that the platform exhibits a power supply ripple of less than 30 mV and communication interface stability meets the standard. It not only reduces hardware costs but also serves as an effective tool for enhancing students' hands-on engineering competencies.

Keywords

embedded systems; PCB design; card-sized; STM32

References

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Funding

Research and Practice Project on Undergraduate Education Reform in Ningxia Hui Autonomous Region in 2023 (bjg2021115)

About the authors

Ding Yongxian (1979-), male, Han ethnicity, from Zhongwei, Ningxia, associate professor, master's student, research direction: embedded systems, Internet of Things, machine learning; Zeng Jianhua (1975-), male, Han ethnicity, from Zhongwei, Ningxia, associate professor, senior engineer, master's student, research direction: Internet of Things, electronic communication, intelligent equipment.