Need help with my final year project...

Thread Starter

navarro_boyz

Joined Jan 20, 2012
1
Hi guys.

I am a final year student of Beng Electrical and Electronic.I am currently doing a project titled "heart rate measurement using fingertip" by Dogan Ibrahim and Kadri Buruncuk @ http://www.emo.org.tr/ekler/a568a2aa8c19a31_ek.pdf and i have modified the circuit and the programming based on my ideas.Therefore, I would like to ask your help in order to check whether there is any problem with my circuit diagram and also with my programming code since i have modified the project on my own.In the hardware side, it works fine but i could not simulate it on the proteus and i suspect that there might be a problem on the circuit part that i may have overlooked.If there is no problems,then only i can do the etching process.

The original circuit by Dogan Ibrahim and Kadri Buruncuk.



My modified circuit.



I added the buzzer on the pin 18 and the "abnormalities" led on the pin 17 of the pic16f784a.In addition,I also added the "on" indicator led with the +9V and the "reset push button" through the pin 4 of the pic16f84a.The programming also have been done according to the changes desired.

The original operation of the project...

BEGIN
Initialize program variables
Configure input-output ports
Display message “READY”
Wait until switch is pressed
Sum = 0
DO 3 times
Get count in 10 seconds
Count = 6 * Count
Sum = Sum + Count
ENDDO
Calculate the average, Rate = Sum / 3
Display the average on the LCD
END

My desired operation of the project...

BEGIN
Initialize program variables
Configure input-output ports
Display message “READY”
Display message "PRESS START"
Wait until switch is pressed
Sum = 0

DO 3 times
Get count in 10 seconds
Count = 6 * Count
Sum = Sum + Count
ENDDO
Calculate the average, Rate = Sum / 3

Normal heart rate
Display the average on the LCD
Beep once using buzzer

High or low heart rate
Display the average on the LCD
Beep three times using buzzer
Led blinking continuously

END

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