Week 14 (FYP 2)

                  

                  Today is the day. Today is 25 April 2013 is the big day for Final Year Project 2's student and also today is Industrial Day at Gemilang Hall because today we had been to present our project to the accessors. My accessors are Sir Tarmizi and Ass Prof Dr Zulkifli. But Dr Zulkifli cannot be attend to viva us and then madam Norhaslinawati from committee Final year project 2 student was replaced him. Students also need to demo their own projects  and present the poster has been prepared before this.

                   Finally, I was done to demo and present my project successfully. Then, for last assessments of my final year project 2, I need finishes up my FYP report  before I proceed on my Final exam before to complete my study in degree level :) Good Luck for myself

Figure 1: My Final Prototype of my project

Week 13 (FYP 2)

                By this week,  I need to complete the poster for presentation on Industrial day next week. I need to prepared the poster and need to check by my supervisor and to make the correction before I go to print the poster. On the poster also, it need to include the Introduction, Objective, Methodology, Block Diagram, Result, References and also Conclusion. By refer on poster also, people can make their own conclusion about overall of my project such as the purpose of the project, how it's work and the results of the project.

Figure 1: Poster of Electronic Stethoscope

Week 12 (FYP 2)

           By this week, I make the casing to cover circuit of my project. The casing that i have buy is ready made casing from the Jalan Pasar but, I need to pierce the casing to the LCD for easily to display the results. To pierce the casing I need to use hole punch, knife and also chisel to make a hole on casing of LCD display.

Figure 1: Process making the casing of project 

Figure 2: Prototype of Electronic Stethoscope

Week 11 (FYP 2)

               By this week, after finishes up create a PCB circuit, etching the PCB board and solder the all component on the board, I try to connect the all circuit with the operational amplifier circuit to test the circuit weather it's functioning well when combined or not functioning. When I test to put the diaphragm of stethoscope on the chest, it was display the result what I want. The result was counting after 30s diaphragm on the chest with LED was blink for a one time for a one heart beat count. But, sometime shows is not more accurate because of noise surrounding. The reading become up to 140 bpm in one time and to avoid the reading high. it need to focus deeply the diaphragm near the heart and also avoid check the heart beat in noisy surrounding.

Figure 1: Result Display

   The figure below shows the step how to use Electronic Stethoscope:

Figure 2: Diaphragm of the stethoscope attach to chest to check the heart beat

Figure 3: LCD Display when the system is turned ON

Figure 4: The result of heart beat count for a normal person

Week 10 (FYP 2)

              By this week, I try to create my flow chart of software  program. The figure below shows the flow chart of Electronic Stethoscope and the flow chart below was explained about the how program of Arduino function and how it's calculated to count the heart beat per minute. The programming not count for one minute to shows the result, but it's just calculate average for 30 second of heart beat detected by diaphragm.

Figure 1: Flow Chart of Electronic Stethoscope

This is a flow chart for this project that is Electronic Stethoscope. First of all, when the button start is pull on, the pre-scan for vibrating normal heart beats will count until 3 second. Then this programming of Arduino will divide the instruction to run 2 programs at the same time that is for the time setting 30 second and then for heart beats that is counting in the time of 30 second. Then this program with mathematical calculation will multiple with 2 for the result of heart beats per 30 second to get the output result total that is in beats per minute, then display it at LCD monitor.

Week 9 (FYP 2)

                 In this week, I try to construct circuit at PCB layout using Altium Designer Release 10- Beta software.  Altium Designer is an EDA software package for printed circuit board, FPGA and embedded Software design, and associated library and release management automation. It is developed and marketed by Altium Limited of Australia. This software is very friendly user because it's can automatic in design of circuit. It's didn't need to manually to draw the circuit to line by line as usual.

Figure 1: PCB layout of Op-Amp circuit

Figure 2: PCB layout of Arduino circuit

Week 8 (FYP 2)

                 For this Week, I try to construct the circuit of the amplifier to connect to the Arduino circuit and view the result using the oscilloscope. When I test the circuit using Op-Amp OPA 344 I get the result what I want but it's have some noise on the waveform of output result. The figure below show the output waveform get from the amplify signal from the Op-Amp OPA 344. The final circuit is the best circuit when the gain is higher enough to increasing the input signal to the output at the end of the circuit.

Figure 1: Testing circuit viewing on Oscilloscope 

                 The output waveform display on output waveform below shows the signal was amplify by the operational amplifier (OPA 334) received heart beat sound from the microphone or when output equal to '1'. The point (A) shows the signal when sensor detected the sound of heart beat and point (B) shows the no sound detected by the sensor or when output equal to '0'  but it have a some noise from the surrounding because of it have a little bit waveform from there. Then, the second figure below shows the waveform when output is received the LED on the circuit also become to turn ON.

Figure 2 : Output waveform

Figure 3: Digital Output (LED turn on)