After a few months I'm getting back to update my progress
of my final project.For the semester break, I had done the
research of circuits that is match for my project. The circuits
are included for measuring :
(a) Body temperature
(b) Heart Rate
(c) SpO2
After discussed with Sir Zul (supervisor), the body temperature
is not important in this project. So, I've just focus for the
other two parameters, heart rate and SpO2. For the heart rate,
I had make an order for the 5V pulse sensor.
Badly, the sensor was not in stock in Malaysia.
So, I need to make an order from www.pulsesensor.com
The time to be arrived is about two weeks.
When I received the sensor, straightly I'm tried the sensor by
running the program of arduino and processing.
For the early few times in testing, the waveform that should be
produce in processing was not displayed any results.
The heart beat was stick with 0 bpm.
But the sensor still gave a result by blinking the red led when
we touch the sensor without run the program. Which means the
sensor is sensed and well-functioned.
Then, I met Sir Zul by showing him the sensor and informed him
what was the matter that I faced. So, what he was done, he just
edit the serial port by looking on the COM No.
Which is means, the serial port had displayed 3 ports :
COM3, COM6 and COM11.
The COM was running in arduino is COM11.
In processing the COM11[2] should be written in the program.
If let say the serial port is COM6,
it should be written COM6[1].
So, the problem is solved by edit the serial port.
The result is displayed as required.
Unfortunately, the picture of the result was not taken.
I was said that because after it was success, when I want to
try it back for the next few days, the sensor was back by not
gave any result.When I connected to the A0, the LED not blink.
When I touched the sensor the LED still not blink.
It means that no sense detected.
When I'm running the program for arduino and processing,
the result not showed as required.
I'm trying so many times, and the result still the same.
So, what can I do is construct the circuit that suitable for measuring the
heart rate.
The sensor that will be used is LDR and Red LED.
The IC will be used LM358 or LM741.
The explanation about the IC will be update in the next post.
Below is shown how is the pulse sensor was looked.
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| The packaging of 5V Pulse Sensor |
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| The pulse is applied to the finger and the Red LED is blinked at that time |
