Research Information System
journal of bionic memory, vol.6, no.2, pp.52-63, 2026 (Peer-Reviewed Journal)
Heart rate is a fundamental physiological parameter that provides practical information about cardiovascular activity and physical exertion. This study presents a low-cost prototype for measuring and displaying fingertip pulse rate using a pulse sensor and an Arduino Uno microcontroller. The pulse signal detected from the fingertip is converted into an electronic signal and presented to the user through an LCD screen and an LED indicator using microcontroller software. The system was first evaluated in the Proteus ISIS simulation environment and then implemented experimentally. Prototype measurements were compared with a commercial fingertip pulse oximeter under resting, walking, and brisk-walking conditions. The overall mean absolute error (MAE), root mean square error (RMSE), and mean absolute percentage error (MAPE) were 2.44 beats per minute (BPM), 3.86 BPM, and 3.08%, respectively. The prototype showed closer agreement with the reference pulse-rate measurements under resting and low-intensity activity conditions; larger deviations were observed after brisk walking, where additional filtering and validation are required