Sanitary pad vending machine using raspberry-pi

Abstract

This project focuses on the design and development of a smart, automated vending machine for sanitary napkin distribution in schools and colleges. Access to menstrual hygiene products remains a challenge in many institutions, often leading to inconvenience and discomfort for students. To address this, the vending machine provides a cashless, contactless, and userfriendly solution using a barcode-based authentication system. Unlike traditional vending machines, this system ensures free and secure access to sanitary napkins for registered users. The primary objectives of this project are to develop a compact and reliable dispensing machine, automate the distribution process, and improve accessibility to sanitary products. The system is designed for ease of installation, low maintenance, and user convenience. For implementation, the machine is powered by a Raspberry Pi 4 Model B, controlling a motor-driven dispensing mechanism. The user scans a barcode (student ID), which is verified against a database of registered users stored in a CSV file. Upon successful authentication, the system activates the motorized dispensing unit, allowing users to collect a sanitary pad. The hardware includes a DC geared motor, a webcam for barcode scanning, and a 3D-printed drive disc. Software development involved Python programming with OpenCV for barcode recognition and GPIO control for motor operation. The results show that the vending machine successfully dispenses sanitary napkins upon valid barcode authentication. The system ensures accurate tracking of usage, reducing misuse while maintaining ease of access. However, the machine requires a stable power source and regular restocking to ensure continuous availability. Future enhancements may include real-time inventory monitoring using sensors and remote access for administrators to track stock levels. In conclusion, this project demonstrates a practical and scalable approach to improving menstrual hygiene accessibility through automation. By integrating barcode-based authentication, the system provides a discreet, efficient, and reliable method for dispensing sanitary napkins in educational institutions.