International Research Journal of Education and Technology

This project presents the development of a non-invasive glucose monitoring system that utilizes infrared (IR) light and the reflectance method to estimate blood glucose levels. The device comprises an IR LED, photodiode, amplifier, low-pass filter, and microcontroller, which together allow for glucose measurement by analyzing variations in IR light absorption and reflection in the tissue. Testing demonstrated the device's capability to track glucose level trends, though factors such as skin type and environmental conditions affected absolute accuracy. Despite limitations, the device shows potential for continuous, painless glucose monitoring, with possible applications in wearable health technology. Further refinement in sensor sensitivity and algorithm optimization is recommended to enhance accuracy.

Key Words: microcontroller, continuous glucose monitoring, infrared absorption, diabetes management.