International Journal of Science, Engineering and TechnologyAuthors: Ancy Bai V, Aswathi N, Deni Shaniya, Assistant Professor N. Michael Franklin
Abstract: Safe storage of temperature-sensitive medicines is a critical challenge in modern healthcare, particularly during transportation, power failures, and emergency situations. Medicines such as insulin and vaccines require a controlled temperature range of 2°C to 8°C to maintain their therapeutic effectiveness. Improper storage conditions cause chemical degradation, reduced efficacy, and serious health risks for patients. This paper presents the implementation of a Nano Med Chiller with Vital Well, a compact, portable, and energy-efficient system designed to maintain the required temperature for safe medicine storage. The system integrates a DS18B20 temperature sensor for continuous internal temperature monitoring, a thermoelectric Peltier module for both cooling and heating operations, and an STM8 microcontroller for automated real-time temperature regulation via a relay module. A rechargeable lithium polymer (Li-Po) battery provides portable, off-grid power supply. A 16×2 LCD display presents current temperature and system status, and a push button enables user interaction. Bare-Metal C firmware implements the temperature control algorithm directly on the microcontroller hardware. Experimental results confirm that the system reliably maintains the required temperature range, responds rapidly to temperature deviations, and operates efficiently in portable and rural healthcare environments, providing a practical alternative to conventional refrigeration for medicine storage.
