Monitoring Heart Rate with SD Card

Abstract

Monitoring heart rate is an electronic device used to observe the condition of the heart continuously. Monitoring devices available today only display a patient bpm value every minute, while one of the tasks of nurses should take note and make graphs for analysis bpm monitoring patients' health. Hope authors nurses can directly monitor bpm values and see the result of the patient's chart bpm simultaneously.

BPM obtained from the pulse / vascular blood flow to the fingers that were censored by the finger sensor. The sensor signals result is what will be processed in the microcontroller circuit. In the processing of the data to be displayed on the display the authors using the IC ATMega32 as micro processors. The monitoring process is done with the device  storage bpm results every minute on the SD Card.

The purpose of this research  is to design a Heart Rate Monitoring include data stored on the SD Card. Design of this research is a pre-experimental research with this type of research After Only Design.

The result of this research is show the maximal error measurement about 0.5%. Signal conditioning heart rate circuit can detect the patient heartbeat with fc about 2,34 Hz. With 2x gain use 101x reinforcement.

Keywords: Heart Rate, BPM, Microcontroller, SD Card