WEEK 14 :  FYP PRESENTATION!

yesterday is the hardest day for me as the engineering student in order to complete my study, I've to face the FYP presentation day.. I'm really nervous because I'll be assessed by two awesome lecturer in BMI. they are Sir Ahmad Basri and Madam Naszariah. I really respect both of this lecturer because for me they are very experience person in engineering technology world.

I'm very glad because both of this lecturer assess me very good. They heard my explanation and gave good feedback for it. I very satisfied!. what ever the marks that I earned, although low marks, I still satisfied because I gave the presentation as the best as I can. I'm very low in self-confidence, but that day I'm very confidence to present all my hard work. Thanks GOD help me a lot. and my mother who never miss to pray for me..

not even forget to my supervisor, Madam Zabariah Zakaria who is always spends her golden time to me..the technician, Abg Faizal who also help me a lot in spending his time to this project. last but no least, all the friend who never give up to give their support although they also busy with their own works. 

this project is really meaningful for me. I prove that, even I am from matriculation student who do not have any basic in either software and hardware, not like other friend who come from diploma, I also can develop my own project, with my own hand, and my own effort. I will appreciate and miss all the single moment in order to finish this DIGITAL HEART BEAT DETECTOR..:)

WEEK 13 : FYP POSTER



this week I focus to finish my FYP poster as my project was done successfully..

this poster was printer in A1 size..the cost for print this poster is RM27..the poster is compulsory for FYP presentation next week..

WEEK 12 : BURNING PROGRAM ON THE PIC16F877A

after the programming is done, this week i will continue to burn the programming that already finish few week ago on the PIC16F877A. this week I went to Jalan Pasar again to buy the IC burner and casing for my project.

Happy! satisfied! the programming was burn in the IC. now the LCD  light on and show the result in LCD display. as what I expected! the result appear as the simulation done before..

after burn the program on the IC, I also put the circuit into the casing so that my project look nice, effective, safe and portable. 

Thanks GOD..ALHAMDULILLAH..everything done successfully. I'm very excited to show it to my supervisor since this week she want to meet all the student under her..hopefully she will proud too..

let's watch the short video of my project....:)

WEEK 11: HEART BEAT DETECTOR WHOLE CIRCUIT

this project require 3 circuits to operate. the first circuit is PIC circuit, secondly the power supply circuit and lastly the sensor circuit. In order to run the project I have to combine all the three circuit.

Figure 1 : sensor circuit

Figure 2: PIC and power supply circuit

 

  

Figure 3 : combination of PIC, power supply and sensor circuit

WEEK 10 : PROGRAMMING FOR DIGITAL HEART BEAT DETECTOR

The software that will be used in this project is PIC programming by using C language and CCS compiler. firstly, I've took the program from the internet but unfortunately the program couldn't compile because of the error that existed in the program. So that, by referring the book reference and also the lecturer's note from the subject taken previous semester, I modify some of the program and the correct the error that occur. Beside referring the book, I also refer to Sir Kamal who is the lecturer of microprosessor subject. he told me to do the program again by starting it back. he guide me a lot in the programming since I'm very weak in programming. besides, I also participate in a few forum in the internet that discus about the program. They are sharing more information about the software, what should do and don't. 

for almost one month I struggle learn about the program and now I really confident to create my own program for my beloved project. finally I can compile the program by using CCS compiler. Alhamdullillah after so many times I try to do it, it's finally meet its point!

I am very excited to simulate the program on the Proteus. Then, I upload the program that I successfully done in the PIC on the proteus to see what will be happen..as shown below:

figure 1 : simulation by proteus 1

figure 2: simulation by proteus 2

by looking at the successful of the simulation, I'm very confident to burn the program on the PIC. the program will be burn on the PIC next week because I'm not buy the IC burner yet. By using the IC burner, I will straightly burn the program on IC to make sure my project is really successfully done!

WEEK 9 : DIGITAL HEART BEAT DETECTOR SENSOR CIRCUIT..

This week I'll share about the sensor circuit. it just a simple circuit but to make this circuit do its function is very hard. I've constructed this circuit for many times but I couldn't get the expected output in term of voltage and waveform. The LED in the sensor circuit should blink when it detect the heart beat. Unfortunately, many times I trouble shoot and construct the circuit but still not functions.

I got advice from technician and lecturer who is very expert in electronics circuit. They give me some advice to change a component in my circuit. the component such LM358 was changed because by explanation that given by the lecturer, he said that the Operatinal Amplifier LM358 is such an IC that easy to burn. maybe the IC was burn because of the current supply to the IC is very high.beside replacing the new Op-amp I also add the resistor so that the current that enter the value of the Op-amp also will be reduced. this is as stated in the ohm's law.:

V=IR

V=voltage

I=current

R=resistance

By accepting all the advice and recommendation  from them, fortunately my sensor circuit is function!! Thanks God. The output voltage is 3.83V as the input is 5V. The LED on the circuit also blinked when finger place on it, which show that the pulse of heart beat is detected. Then, the waveform also appear at the oscilloscope as shown below.

Figure 1 : output voltage measured

figure 2: output waveform

figure 3: sensor cicuit

that is the sensor circuit! although look just a simple circuit but its very hard to finish it. the sensor circuit is compose of:

1. resistor
2. LED
3. variable resistor
4. LM358
5. capacitor.

the input voltage is 5v and the output voltage measured is 3.83V as already mention above..

WEEK 8 : PULSE OXYMETER PROBE

In my project of digital heart beat detector, I will use pulse oxymeter probe for detecting the signal of heart beat. The figure of the pulse oximeter that I will use is shown below.

Figure 1: Pulse Oxymeter Probe

There are two approaches to developing an oximeter probe. The first uses transmitted light, the second uses reflected light. The difference is in the way the elements within the probe are positioned (see Figure 2). A transmittance probe has two LEDs on one side and a LDR (light detector) on the other. The tissue to be analyzed is inserted between the two. Transmittance probes are commonly placed on a finger and are very convenient to attach and remove.
A reflectance probe has the LEDs and the LDR on the same side. It must be placed over a point with underlying bone. Light is emitted by the LEDs, passes through tissue and blood vessels, reflects from the bone, passes through the tissues again, and is then detected.

Figure 2 : Transmission VS Reflectance

For my project, I prefer to use type of transmittance probe because attachment of a reflectance probe is, in general, more difficult than attachment of a transmittance probe, and proper attachment of a reflectance probe is essential to ensure its signal quality. Also, properly attaching a reflectance probe is quite time consuming which may lead to improper use.

Figure 3 : Wearing Pulse Oximeter

The finger is place between the pulse oximeter probe. The heart beat is detected when the finger place on it.

reference : http://bmedesign.engr.wisc.edu/websites/file.php?file=236&id=201