STM32-Based Smart Waste Bin for Hygienic Disposal Using Embedded Sensing and Automated Control

TL;DR

This paper introduces a contactless, sensor-based waste bin system using STM32 microcontroller, ultrasonic sensors, and servo motor to enhance hygiene and convenience in various environments.

Contribution

It presents a low-cost, reliable automated waste bin with integrated sensing and control, improving hygiene through touchless operation.

Findings

Fast response time demonstrated

Stable sensing performance achieved

Smooth mechanical operation verified

Abstract

The increasing demand for hygienic and contactless solutions in public and private environments has encouraged the development of automated systems for everyday applications. This paper presents the design and implementation of a motion- sensing automatic waste bin using an STM32 microcontroller, ultrasonic sensors, and a servo motor. The system detects user presence through ultrasonic sensing and automatically opens the bin lid using a servo motor controlled by the microcontroller. An additional ultrasonic sensor is used to monitor the internal waste level of the bin, while an OLED display provides real- time feedback regarding system status. The proposed system offers a low-cost, reliable, and easily deployable solution for touch-free waste disposal. Experimental evaluation demonstrates fast response time, stable sensing performance, and smooth mechanical operation. The system can be effectively deployed in homes, educational institutions, hospitals, and public facilities to improve hygiene and user convenience.