Han Yuzhe, Wu Songjie^*

Liaoning Institute of Science and Technology

Abstract：

Against the backdrop of the deep integration of public health needs and maker education, contactless devices have become an important direction for technological innovation and practical teaching. As a basic carrier connecting daily life and intelligent technology, trash bins face problems such as unhygienic contact operation and lack of suitable practical carriers for maker education. This paper designs a contactless trash bin system based on the Arduino open-source platform, aiming to solve the dual needs of public health protection and maker education practice. By constructing a "hardware modularization-software intelligentization-teaching scenario adaptation" three-dimensional architecture, the system integrates ultrasonic sensing technology, embedded programming and mechanical structure design. It innovates a "distance threshold dynamic adjustment-anti-interference algorithm optimization-modular assembly" implementation path, realizing the organic unity of stable contactless operation, low-cost development and easy teaching practice. The test results show that the system has a sensing distance error of ±0.5cm, a false trigger rate of less than 3% in complex environments, and the average assembly time for middle and primary school maker teams is 25 minutes. It not only provides a practical solution for reducing contact pollution in public health scenarios such as families, campuses and public toilets, but also forms a replicable teaching paradigm for maker education, which has important reference value for the integration of intelligent hardware technology into daily life and basic education practice.

Key Words：

Arduino; maker education; ultrasonic sensing; modular design