The research discussed health services in the role of diagnostics and life support. The designed system was a system able to provide information on the user's health condition, in this case, a measure of heart rate and body temperature using a heart rate sensor (finger-tip sensor). It took the data from the blood flow on the index finger for 60 seconds, then displayed it on the LCD. The LM35 temperature sensor was used for body temperature data collection. Changes in the sensor heat would be converted into electricity, translated into digital form through a 10-bit ADC, processed by the ATMega 16 microcontroller, and displayed on the LCD. The results showed that the error of each parameter of heart rate and body temperature was <1.702% and <0.55%.
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