fyp_ week 4 : The results

this is captured the uotput sound and waveform of hearbeat from the circuit. as instructed by supervisor. we use the Thinklab Phonocardiography software to capture the output signal.

fyp_week 3 : Buying and building

these are component that bought from Nixie Electronics in Jalan Pasar, KL

we bought 2 set of these component and it just cost me about RM15. They are quite cheap.

 

this circuit is working and can be detect haertbeats.

 it is better to use piezo than mic because piezo detect vibration and mic detect noise in the air. we will upload the output result of my circuit in my next entry.

fyp_week 2 : The circuit diagram

this is the circuit diagram. we use to build final year project. 

the components are :

- LM386 Low Voltage Audio Power Amplifier

- MPF102 Transistor

- 1K Ohm 1/4-Watt Carbon Film Resistor

- 1M Ohm 1/4-Watt Carbon Film Resistor

- 10 Ohm 1/4W 5%  Carbon Film Resistor

- 4.7K Ohm 1/4-Watt Carbon Film Resistor

- (x2) 0.047µF 50V Capacitor

- 220µF 35V 20% Radial-lead Electrolytic capacitor

- 100µF 35V 20% Radial-lead Electrolytic capacitor\

- 0.1µF 50V Hi-Q Ceramic Disc Capacitor

- 10K Ohm Linear-Taper Potentionmeter

- 1/8” Mono Panel-Mount Audio Jack

- Earphone/Headphone

- 9V Battery Snap Connectors

- 9 Volt Battery

- 90dB Piezo Pulse

function the component:

 LM386 Low Voltage Audio Power Amplifier
~The Contek LM386 is a power amplifier, designed for
use in low voltage consumer applications. The gain is
internally set to 20 keep the external part count low,
but the additional of external resistor and capacitor
between pin 1 and pin 8 will increase the gain to any
value up to 200.

 

MPF102 Transistor
 ~This device is designed for electronic switching applications such as
low ON resistance analog switching.
~ Sourced from process 50 
 

fyp_week 1 : My final year project

 this is the final year project. the title is Development of low cost Eltronic stethoscope. my final year project team together with syazwan bin ahmad. and name supervisor is mohd zubir bin suboh. above is the example of how my projcet will look like after it is finish.

Introduction project

introduction electronic stethoscope

 

The stethoscope is one of the most simple and practical diagnostic tools used in medicine. Presently, two different types of stethoscopes available on the market are acoustic and electronic. Advantages of acoustic stethoscope are overcome by the sensitivity of the electronic stethoscope to manipulate artifacts, and ambient noises. Also, they do not take into consideration the sensitivity of the human ear, which varies significantly as a function of frequency. Therefore electronic stethoscope has become the demand in this new era of technology.

The purpose of this project is to design an amplifier circuit which is used in electronic stethoscope (biomedical instrumentation). This project is focusing mainly on the operational amplifier which is used for multiple purposes. Basically the whole process is trying to amplify a small signal into a larger signal with reduced noise so that the output signals will he greatly amplified. Operational amplifier is used for the purpose of amplifying the output signal. The outputs will he displayed in an oscilloscope to see the amplified signal. The designed circuit will be first simulated by using the Oscilloscope to analyse the output of the signal processing throughout each of the op-amp.  Subsequently, we have to design the hardware of the circuit to design a functional circuit which is reliable with the theory. The expected output/results are an amplified signal with reduced noise.

planing the final year project in gantt chart