fisika instrumen

A. PRAKTIKUM 8 LED DAN 12 LED
1. Led berjalan dari kiri ke kanan kemudian stop.
2. Led berjalan dari kanan ke kiri kemudian stop.
3. Led berjalan dari kiri ke kanan kembali ke kiri kemudian stop.
4. Led berjalan dari kiri ke kanan kembali ke kiri ke kanan dan kembali ke kiri kemudian stop.

Jawab:
Program yang dijalankan untuk menyala kan Led berjalan dari kiri ke kanan kemudian stop, adalah sebagai berikut:

- Kode program untuk 8 LED

program led_8;
uses crt;
var i:byte;

procedure r0;
begin
i:=128;
repeat
port[$378]:=i;
delay(500);
i:=i div 2;
until i=0;
end;

procedure r1;
begin
i:=1;
repeat
port[$378]:=i;
delay(500);
i:=i*2;
until i=0;
end;

begin
r0;
r1;
end.

- Kode program untuk led 12:

program led_12;
uses crt;
var i:byte;

procedure r0;
begin
port[$37a]:=$0b;
delay(1);
i:=1;
repeat
port[$378]:=i;
delay(500);
i:=i*2;
until i=0;
port[$378]:=i;
if i=0 then
port[$37a]:=$0a;
delay(500);
port[$37a]:=$09;
delay(500);
port[$37a]:=$0f;
delay(500);
port[$37a]:=$03;
delay(500);
end;

procedure r1;
begin
port[$37a]:=$0f;
delay(500);
port[$37a]:=$09;
delay(500);
port[$37a]:=$0a;
delay(500);

port[$37a]:=$0b;
i:=128;
repeat
port[$378]:=i;
delay(500);
i:=i div 2;
until i=0;
end;

begin
r0;
r1;
r0;
end.

analisa Program:

Pendefenisian i sebagai byte digunakan sebagai input nilai port parallel, untuk menggantikan nilai integer $xx seperti yang terlihat di baris 8. Nilai i yang didefenisikan sebagai byte dapat mewakili nilai integer, seperti yang terlihat pada tabel berikut:
Tabel 1. Tabel konversi I as byte ke I as integer.
I as byte I as integer Bit/biner I as byte I as integer Bit/biner
0 $00 0000 0000 128 $80 1000 0000
1 $01 0000 0001 64 $40 0100 0000
2 $02 0000 0010 32 $20 0010 0000
4 $04 0000 0100 16 $10 0001 0000
8 $08 0000 1000 8 $08 0000 1000
16 $10 0001 0000 4 $04 0000 0100
32 $20 0010 0000 2 $02 0000 0010
64 $40 0100 0000 1 $01 0000 0001
128 $80 1000 0000 0 $00 0000 0000

Seperti yang terlihat pada kode kode program di atas, program terdiri dari dua prosedur dan satu bagian untuk memanggil prosedur yang akan di jalankan. Prosedur dengan nama r0 ditujukan untuk menghidupkan led berjalan dari kiri ke kanan dan prosedur dengan nama r1 sebaliknya.
Untuk prosedur r0, nilai awal i bernilai 128 (i:=128;) yang bertujuan untuk menghidupkan 1 led paling kanan, seperti pada tabel di atas. Perintah repeat pada rosedur r0 menunjukkan perulangan atau pergantian nilai i dengan operasi pembagian variabel i dengan 2 (i:=i div 2;). Seperti yang kita ketahui, pada sistem perhitungan komputer, jika suatu nilai variabel menghasilkan nilai yang baru maka nilai terakhirlah yang akan disimpan, contoh;
“Jika nilai awal I = 1 lalu dioperasikan dengan operasi perkalian I = I x 2, maka nilai terakhir I bukan 1 lagi, melainkan 2 karena 1 x 2 = 2.”
Sehingga urutan nilai i yang dihasilkan operasi (i:=i div 2;) adalah 128, 64, 32, 8, 4, 2, dan 1. Serta membuat kesan led berjalan dari kiri ke kanan dengan selang waktu 0.5 detik ”delay(500).”
Karena nilai byte terkecil untuk port parallel adalah 0 dan nilai terbesar adalah 255 maka jika operasi menghasilkan nilai I < 0 atau I > 255 maka port akan membaca nilai tersebut sebagai nol. Sehingga jika i = 0 (until i=0;) maka prosedur selesai dijalankan dan diteruskan ke prosedur lain sesuai dengan perintah pemanggilan proedur.
Begitu juga pada prosedur r1, nilai awal i = 1 maka led sebelah kiri yang akan hidup. Diteruskan dengan nilai i berikutnya, yaitu 2, 4, 8, 32, 64, dan 128 (berdasakan operasi I:=I*2;). Hasilnya, led akan terlihat berjalan dari kanan ke kiri dengan selang waktu 0.5 detik ”delay(500).”
Untuk soal A3 kita memberikan printah prosedur r0, r1, dan r0. untuk soal A4 kita dapat memberikan printah prosedur r0, r1, r0, dan r1.

Untuk 12 led, rangkaian tersebut memanfatkan 4 pin pc untuk mengoperasikan 4 led dari 12 led yang ada. Terdapat 4 kode yang merepresentasikan alamat 4 pin pc tersebut, yaitu port[$37a]:=$0a untuk pc0, port[$37a]:=$09 untuk pc1, port[$37a]:=$0f untuk pc2, port[$37a]:=$03 untuk pc3.
Secara sederhana, pin pc tidak dapat mengoperasikan 4 led tersebut secara bergantian tanpa menggunakan perintah delay. Untuk untuk itu ditambahkan perintah delay setelah perintah port[$37a].
Susunan perintah port[$37a] pada tiap prosedur disusun sedemikian rupa agar dapat mengoperasikan 4 led tersebut secara berurut sehingga led terlihat berjalan.

B. PRAKTIKUM 32 LED
Buat huruf H, A, dan P dari 32 led (led matriks 4 X

Jawab.
Kode program untuk praktikum membuat huruf H adalah sebagai berikut:

program led32H;
uses crt;
begin
repeat
port[$378]:=$00; {memberi jalan arus kepada pc0}
port[$37a]:=$0a; {mengalirkan arus ke pc0}
delay(1);
port[$378]:=$f7; {memberi jalan arus kepada pc1 untuk data 4}
port[$37a]:=$09; {mengalirkan arus ke pc1}
delay(1);
port[$378]:=$f7; {memberi jalan arus kepada pc2 untuk data 4}
port[$37a]:=$0f; {mengalirkan arus ke pc2}
delay(1);
port[$378]:=$00; {memberi jalan arus kepada pc3}
port[$37a]:=$03; {mengalirkan arus ke pc3}
delay(1);
until keypressed;
end.

Kode program untuk praktikum membuat huruf A adalah sebagai berikut:

program led32A;
uses crt;
begin
repeat
port[$378]:=$00; {memberi jalan arus kepada pc0}
port[$37a]:=$0a; {mengalirkan arus ke pc0}
delay(1);
port[$378]:=$ee; {memberi jalan arus kepada pc1 utk data 1 & 5}
port[$37a]:=$09; {mengalirkan arus ke pc1}
delay(1);
port[$378]:=$ee; {memberi jalan arus kepada pc2 utk data 1 & 5}
port[$37a]:=$0f; {mengalirkan arus ke pc2}
delay(1);
port[$378]:=$00; {memberi jalan arus kepada pc3}
port[$37a]:=$03; {mengalirkan arus ke pc3}
delay(1);
until keypressed;
end.

Kode program untuk praktikum membuat huruf P adalah sebagai berikut:

program led32P;
uses crt;
begin
repeat
port[$378]:=$00; {memberi jalan arus kepada pc0}
port[$37a]:=$0a; {mengalirkan arus ke pc0}
delay(1);
port[$378]:=$ee; {memberi jalan arus kepada pc1 utk data 1 & 5}
port[$37a]:=$09; {mengalirkan arus ke pc1}
delay(1);
port[$378]:=$ee; {memberi jalan arus kepada pc2 utk data 1& 5}
port[$37a]:=$0f; {mengalirkan arus ke pc2}
delay(1);
port[$378]:=$e0; {memberi jalan arus kepada pc3 utk dat 1 s/d 5}
port[$37a]:=$03; {mengalirkan arus ke pc3}
delay(1);
until keypressed;
end.

Analisa program

Berdasarkan rangkaian 32 led, program yang dibuat untuk menghidupkan seluruh led adalah hanya dengan mengaktifkan saluran pc seperti contoh program berikut:

program led32;
uses crt;
begin
repeat
port[$37a]:=$0a;
delay(1);
port[$37a]:=$09;
delay(1);
port[$37a]:=$0f;
delay(1);
port[$37a]:=$03;
delay(1);
until keypressed;
end.

Program tersebut menghidupkan semua led secara serentak dengan bantuan perintah repeat dan delay(1) yang berarti mengulang eksekusi program dengan selang waktu 1/1000 detik sehingga mata kita tidak dapat melihat perulangan yang terjadi dan memberi kesan led terus menyala tanpa redupan.

Hal ini disebabkan karena saluran pc dikoneksikan ke kaki katoda led dan saluran data dikoneksikan pada kaki anoda led agar arus dapat melewati led dan menyalakan led (bias forward) selagi saluran data berada pada perintah port[$378]:=$00; ataupun data kosong. Namun ketika saluran data diberi nilai, misalnya port[$378]:=$ff; maka akan terjadi bias reserve yang menyebabkan led redup. Hal ini dapat dimanfaatkan untuk mengendalikan pengoperasian led, misalnya menyalakan beberapa led untuk membentuk suatu huruf pada tampilan 32 led.

C. PRAKTIKUM 7 SEGMENT
Membuat teks sebagai berikut “ FIS 2007 “

Komponen 7 segmen berjumlah satu, sehingga kode programnya sebagai berikut:

program fis_2007;
uses crt;
begin
port[$378]:=$71; {mengaktifkan data 1, 5, 6, 7 / a, f, g}
delay(500);
port[$378]:=$06; {mengaktifkan data 2, 3 / b, c}
delay(500);
port[$378]:=$6d; {mengaktifkan data 1, 3, 4, 6, 7 /a, c, d, f, g}
delay(500);
port[$378]:=$5b; {mengaktifkan data 1, 2, 4, 1, 3/ a,b,d,e,g}
delay(500);
port[$378]:=$3f; {mengaktifkan data 1, 2,3,4, 5, 6/a,b,c,d,e,f}
delay(500);
port[$378]:=$00; {data low}
delay(100);
port[$378]:=$3f; {mengaktifkan data 1, 2,3,4, 5, 6/a,b,c,d,e,f }
delay(500);
port[$378]:=$07; {mengaktifkan data 1, 2, 3/a,b,c}
delay(500);
end.

Analisa program:

Berdasarkan rangkaian dasar seven segmen,

hanya digunakan printah untuk mengaktifkan port data saja, yaitu port[$378]:=$xx;. Misalnya untuk membentuk angka 8, kita dapat mengisi data port dengan nilai $7f, untuk membuat angka 5 kita dapat mengisi data port dengan nilai $6D dan seterusnya.

wasalam; semoga bermanfaat :-}

ketika kita berfikir benar
sudahkah kita berfikir benar
ketika realita mengganggu mimpi kita, akankah kita terima dengan hati terbuka
teruslah berfikir jernih

Tugas : Laporan Uji Komponen
Mata Kuliah : Instrumentasi Berbasis Komputer

LED

Gambar 1. Bentuk fisis dan simbol LED
LED adalah singkatan dari light emiting diode atau dalam bahasa indonesia biasa diartikan sebagai dioda yang dapat memancarkan cahaya. Seperti dioda, LED memiliki kutub anoda (+) dan kutub katoda (-) dan bekerja pada tegangan 1,6 Volt. Seperti yang terlihat pada gambar 1. Cahaya yang dipancarkan bervariasi jenisnya deradasarkan bahan pembentuknya. LED yang banyak beredar dipasaran adalah LED cahaya tampak.
Pengujian LED
Pengujian LED bertujuan untuk menentukan kelayakan LED dan menetukan jenis kutubnya.
Prosedur Pengujian
Prosedur pengujian led sebagai berikut:
1. Memilih multimeter yang layak digunakan.
2. Menetukan probe pada multimeter;
a. Untuk probe positif ditandai dengan tanda plus (+)/warna merah.
b. Untuk probe negatif ditandai dengan tanda plus (-)/warna putih atau hitam.
3. Memilih option Ohm Meter pada multimeter.
4. Menghubungkan kutub-kutub LED dengan probe multimeter seperti pada gambar 2.
a. Probe positif multimeter dihubungkan ke kutub yang panjang (anoda) dan probe negatif multimeter dihubungkan ke kutub yang pendek (katoda).
b. Probe positif multimeter dihubungkan ke kutub yang pendek (katoda) dan probe negatif multimeter dihubungkan ke kutub yang panjang (anoda).
5. Mengumpulkan data.
6. Analisa data.
7. Kesimpulan.

Gambar 2. Diagram pengujian
Data Pengujian LED
Dari pengujian di peroleh data sebagai berikut:
1. Ketika probe positif multimeter dihubungkan ke kutub yang panjang (anoda) dan probe negatif multimeter dihubungkan ke kutub yang pendek (katoda), LED tidak menyala.
2. Ketika probe positif multimeter dihubungkan ke kutub yang pendek (katoda) dan probe negatif multimeter dihubungkan ke kutub yang panjang (anoda), LED menyala.
Analisa Data
Dari data yang diperoleh, diketahui bahwa ketika probe positif multimeter dihubungkan ke kutub yang pendek (katoda) dan probe negatif multimeter dihubungkan ke kutub yang panjang (anoda), LED menyala. Sedangkan kutub katoda itu sendiri merupakan kutub negatif. Seharusnya, jika kita lihat dari prinsipnya bahwa bias forward (dioda menyala) terjadi jika kutub anoda led dihubungkan ke kutub positif sumber tegangan.
Dari analisa di atas dapat kita pahami bahwa probe positif multimeter mewakili kutub negatif sumber tegangannya.
Kesimpulan
Dari data dan analisa di atas, dapat kita simpulkan bahwa kutub anoda dan kutub katoda LED adalah seperti pada gambar berikut:

Gambar 3. Kutub-kutub pada LED hasil pengujian

Dan jika Point1b pada prosedur di atas menujukkan led tidak menyala, maka dapat disimpulkan led dalam keadaan rusak.

SEVEN SEGMEN
Seven segmen merupakan sebuah rangkaian led yang dibuat guna merepresentasikan angka desimal serta huruf. Ada dua tipe seven segmen yaitu common cathode dan common anode. Seperti yang digambarkan pada gambar di bawah ini.

Gambar 4. Skema rangkaian Seven Segmen
Sedangkan bentuk fisiknya adalah sebagai berikut:

(a) (b)
Gambar 5. Bentuk fisik dari seven segmen
Dari gambar di atas dapat kita lihat bahwa seven segmen terdiri dari 8 led yaitu led a, led b, led c, led d, led e, led f, led g, dan led dp. Pada gambar 5(b) huruf-huruf seperti a, b, c, d, e, f, g, dp, K dan K menggambarkan pin-pin dari seven segmen. Dan huruh K menunjukkan tipe seven segmen, yaitu Common Kathode.
Pengujian Seven Segmen
Pengujian seven segmen bertujuan untuk menentukan kelayakan dan tipe seven segmen.
Prosedur Pengujian
1. Memilih Multimeter yang layak.
2. Memutar option Ohm Meter.
3. Menandai tiap segmen dengan huruf-huruf seperti a, b, c, d, e, f, g, dp. Seperti pada gambar 6.
4. Mencari pin K atau pin ground pada seven segmen.
5. Menghubungkan satu persatu pin-pin yang ada pada seven segmen dengan probe multimeter. Dan sebagai referensinya pin ground.
6. Mengumpukan data.
7. Analisa data.
8. Kesimpulan.

Gambar 6. Diagram pengujian
Data Pengujian
Tabel 1. Data Pengujian Seven Segmen

Led yang menyala Pin seven segmen terhadap probe positif/Kutub (-) Pin seven segmen terhadap probe negatif/Kutub (+)
a 3 7
8 7
b 3 6
8 6
c 3 4
8 4
d 3 2
8 2
e 3 1
8 1
f 3 9
8 9
g 3 10
8 10
dp 3 5
8 5
Analisa Pengujian
Dari data yang diperoleh, ditunjukkan bahwa pin 8 dan 3 dikoneksikan dengan probe positif multimeter atau kutub negatif smber tegangan. Hal ini menunjukkan bahwa pin 8 dan pin 3 merupakan pin ground.
Data yang lain dapat diinetpretasikan ke dalam gambar 7, yang berarti seven segmen yang diuji bertipe Common Kathode.

Gambar 7. Inetpretasi data pengujian ke dalam sirkuit led
Kesimpulan
Dari data dan analisa di atas, dapat kita simpulkan bahwa seven segmen yang di uji bertipe Common Kathode dan layak untuk dipakai.

KONFIGURASI PIN PADA PORT PARALLEL.

Gambar 8. Pin port parallel female (betina) Tipe DB 25

Port parallel memiliki tiga bagian penting, yaitu: Port data (DP) yaitu dari pin 2 sampai dengan pin 9; Port control (PC) atau port read/write yaitu pin 1, 14, 16, dan pin 17; Port status (PS) atau port read only yaitu pin 10, 11, 12, 13, dan pin 15. Pin-pin berikutnya merupakan pin ground.
Pada tabel berikut ditunjukkan konfigurasi pi-pin port parallel.
Tabel 2. Konfigurasi pin port parallel Tipe DB 25

Pin (D-Type 25) SPP Signal Direction In/out Register Hardware Inverted
1 nStrobe In/Out Control Yes
2 Data 0 Out Data
3 Data 1 Out Data
4 Data 2 Out Data
5 Data 3 Out Data
6 Data 4 Out Data
7 Data 5 Out Data
8 Data 6 Out Data
9 Data 7 Out Data
10 nAck In Status
11 Busy In Status Yes
12 Paper-Out / Paper-End In Status
13 Select In Status
14 nAuto-Linefeed In/Out Control Yes
15 nError / nFault In Status
16 nInitialize In/Out Control
17 nSelect-Printer / nSelect-In In/Out Control Yes
18 - 25 Ground Gnd

Design and Construct Heartbeat Detector
Use Ultrasonic Doppler Effect Based On PC

Muhammad Rizki
Student of Physics Department Universitas Negeri Medan

Abstract
Heart attack is one of diseases that occur on second place in level of diseases with dead risk. The simple methods for check the heartbeat usually use stethoscope. To get the detail of heart condition, it can be used electrocardiograph (ECG) or phonocardiograph (PCG). However, these instruments are very expensive so that not every hospital owns these instruments.
The advance of technology, especially computer technology, allow us to solves this problem more be simple. The heartbeat can be record via PC’s soundcard and display the rhythm by graphic on monitor.
To detecting the heartbeat, ultrasonic transducer can be use. Doppler Effect method on Ultrasonic theme is matches for this problem. The wave from vibration of heart would be influence the wave which transferred by ultrasonic transducer. After that, the mechanical signal, i.e. the wave that received transducer converted to electric signal, than downloaded by soundcard.
Some variable are the frequency sampling of transducer. That is 11025 Hz, 22050 Hz, and 44100 Hz, and the detected input signal about 20 Hz to 20,000 Hz. The amplitude of input signal is 2VAC and the display buffer is 50 ms.
The results, obtain good values for all parameters and suitable with the specification that designed. The test using normal and abnormal heart sound and display the graphic recording of heart sound on monitor of personal computer.

1. INTRODUCTION
Some case of dead is causes by heart attack. Low knowledge of the peoples about healthy care is one of causes. Some people just know they heart condition after they heart condition is bad.
The simple detector is stethoscope. For check the detail of heart condition, we have to use ECG or PCG. These instruments used if the heart condition is worse. More ever, these instruments are very expensive so not every hospital owns these instruments.
Ultrasonic Doppler Effect can be made as a cheaper instrument. To make the heart detector based on PC there are some problem. i.e.: How to design and construct the transducer Operational Amplifier, how to design and construct the interface system to download the output of transducer to computer system, and how to programming the computer system to display the graphic of heartbeat on monitor.

2. THEORY

2.1 Function of Tape Recorder of Heartbeat
Inspection to know disparity of heart organ, by doing number of heart tick i.e. blood pressure, rhythm of heart tick, and others. Patient with disparity of heart function, inspection of heartbeat is needed. These treatments are to know the interval time of systoles, frequency of heart tick, and phase of heart cycle. Some variable are relate to heartbeat, that is voice intensity, frequency, duration, its hardness, tone, and sound colors.
Sensor or transducer are used to convert the voice of heart becomes the electric signal. One of sensor, which used is stethoscope. Change of stethoscope surface because of voice of heart tick will cause the change capacitance yielded. The other way is use the ultrasonic effect Doppler method.

2.2 Sound Cardiovascular
Sound cardiovascular yielded in or around big vein and heart, sends through solid media, and melts to thorax wall. During auscultation heart, we will listen the sound which conducted by air through stethoscope. Auscultation heart limited by two factor, i.e. first by sill of sensitivities of human being ear. Normal adult can hear the voice about 20 until 14.000 cps, but the best heard between 1000 until 5000 cps. Less than 1000 cps heard becomes a progressive degradation at sensitivities hearing. Most of all sound cardiovascular, which significant by clinics, is became the frequency 20 until 500 cps (sometime reach 1000 cps). A sound cardiovascular, which audible as harder and softer voice. The second factor is stethoscope itself.

2.3 Stethoscope
Sign from good stethoscope send the goodness of low frequency sound (20 until 100 cps) and high frequency sound (100 until 1000 cps). Component of low frequency from sound with fixed frequency will bother the high frequency component. As a result, component of high frequency from sounds heard loudly or even not heard. Diaphragm from stethoscope will weaken the low frequencies (20 until 100cps) and selectively send the high frequency so that can be auscultated. Correct use from diaphragm or bell is important for the accurate of auscultation.
Correct election stethoscope of heart show at figure. Ear plates have to be big enough and snugly, so that do not enter the canals auriculars (its hose have to be flexible start from 12 until 14 inches). Its chest has to be consisted of the bell and diaphragm. Bell used to listen the sound and murmur with the lower frequency, while diaphragm uses for the sound of and murmur with the higher-level frequency. Divisible sounds Cardiovascular become:
a) Finite sound or transient is called heart sound.
b) Longer combination from vibrates, is called murmur heart.
Heart sound, which auscultated often divisible become:
a) Normal sound (S1 and S2).
b) Abnormal variation from S1 and S2.
c) A sound that heard physiological or pathological (S3 and S4).
d) Sound which usually mirror the heart sickness like voice ejects or click the (SE), click the mid or final of systolic (KMS) and opening snap (OS).
Before physical examination, patient has to be placed in quite room. Radio, television, and conversation represent the especial trouble to a success inspection. For the auscultation of start, patient has to be supine and upraised body 30 degree.
Throb of Artery carotid used to determine the sound of heart and murmur. S1 happened momentary before incidence of systolic carotids throb and S2 before or at the same time with the wave of dichotic notch of throb carotids. After the S1 and S2 determination, other heart sound can be determined.

2.4 Main Area of Heart Auscultation
To obtain the heart voice the other observation is conducted at four areas. That is shown at Figure 1. Although for the advance, inspection is farther need to sighting at additional area. The four especial areas are:
1)Aorta area (2RSB).
2)Area Pulmonal (2LSB).
3)Area Tricuspid (4LSB).
4)Area Mitral/apeks (5MCL).

Figure 1. Especial area of heart auscultation. (Emanuel Stein: 1994, 10)

2.5 Ultrasonic Doppler Effect Transducer
Ultrasonic transducer of Doppler Effect represents transducer using ultrasonic wave principe. Difference calculation between transmission wave frequency with the reflected wave frequency, is obtainable to determine frequency of friction Doppler. The ultrasonic transducer work principle shown at Figure 2. At transducer of Doppler Effect, Fs represent transmitted ultrasonic wave, while Fr represent the reflected ultrasonic wave. So that, there are three conditions might be happened i.e.:
a. If ultrasonic wave hit the silent medium hence Fs = Fr
b. If ultrasonic wave hit the peripatetic medium to the direction sensor hence Fs < Fr
c. If ultrasonic wave hit the peripatetic medium avoid the transducer direction, hence Fs > Fr.
If ultrasonic wave hit the unmoved medium, so the frequency of displacement Doppler Effect is countable, that is as follows:
Fc = Fr – Fs (1)
From frequency of displacement, Doppler Effect can be obtained the frequency from the peripatetic medium.

3. METHOD
The method to solve the internal issue in this research is doing software programming, which can present the signal of the heartbeat on the screen monitor. In this research, some procedure as follows:
1. Observe the specifics of heartbeat recorder i.e. (ECG or PCG). This observed as reference to determine the specifics hardware that available in market. Some variable considered are:
O Sampling Frequency, which can be used in this program, that is 11025 Hz, 22050 Hz, and 44100 Hz, so that frequency of signal input, which be able to detects that is 20 Hz until 20 KHZ.
O Amplitude of signal input is 2V AC with buffer of appearance signal is 50 ms.
2. Design and construct circuit by considering aspect of circuit scheme and determine the needed component. In general, block of appliance shown in Figure 2.1.

Figure 2.1. Block Diagram.

3. Programming the software use Borland Delphi version 5.
4. Test the entirely instrument as examination of result of signal recording of heartbeat in computer monitor.
4. EXAMINATION
The tested by using normal heartbeat and abnormal heartbeat are marked by disparity of heartbeat with the existence of murmur. Follow the example of the appearance program shown Figure 3 and 4.

Figure 3. The continue voice of normal heartbeat of S1 and S2.

Figure 4. The continue voice of murmur of S1 and S2.

5. DATA ANALYSIS

Best heart Voice (S1) is auscultated at heart apex area (area of mitral or 4th area). This matter is proved by hear S1. Break area tricuspids marked with many ripple or oscillation from heart. Voice of S1 heard as single sound heard at aorta and apex area.
a. The record voice of heart patient by atrium septum defect, sees that signal which recorded some ripple with the period which length enough. Those heart voices were caused:
a. Heavy pulmonal stenos knob.
b. Mitral regurgitation, which significant left ventricle disfunction.
c. The right branch of jars blocks which significant self-ventricle disfunction.
d. Defect of septum atrium.
b. Heart murmur described by a high or low tone with the frequency reach on 60 to 100 cps. Heart murmur can be the middle tone, harsh or ossify reach about 100 until 150 cps as well as can be high impressing with the bigger frequency with 300 cps
c. As a complete heard voice, heart murmur has period oscillation or longer ripples, so that the heart voice S1 and S2 become progressively impersonate.

6. CONCLUSION
From result of instrument test, inferential that:
1. Program has been worked, that is present the heart voice, which the sampling process uses the facility from soundcard. Specification of program, which made that is:
* Frequency Sampling is 11025 Hz, 22050 Hz and 44100 Hz, so that frequency of signal input which detected is 20 Hz until 20 KHZ.
* Maximal Amplitude Signal input is 2 Vpp
* Buffer of Appearance signal is 50 ms
2. The quality of signal that present in this program is the output of heartbeat from sensor of Doppler Effect.
3. The conditional signal circuit, which made just limited to amplifying signal with the reinforcement until 5 times.
4. Input to sound card and output from sensor was selected at 1 Vpp until 2 Vpp. This
5. The result presented a normal heartbeat and abnormal hart bit.
7. SUGGESTION
To get some appearance information of heartbeat, writer suggests:
1. Time/Div election is about 10 ms/div or 20 ms/div, so that be able to detect the heartbeat until some period in one screen.
2. The resolution of screen more expected to deep resolution, so that will be optimal to present the heartbeat in a few second period.
3. To fill this suggestion, hence in programming require large memory capacities and high speed processor so that yielding figure with real time.

REFERENCE
Doebelin, Ernest O. 1990. Measurements System Application and Design. Fourth Edition. Department of Mechanical Engineering the Ohio State University: McGraw-Hill, International Edition.
DuBovy, Joseph, 1992, Introduction to Biomedical Electronics, McGraw-Hill, International Edition.
Lukkarinen S., Sikio K., 1997, Novel Software for Real-Time Processing of Phonocardiograph Signal , 19th Annual International Conference IEEE Engineering in Medicine and Biology Society, Chicago, USA
Huiying L., Lukkarinen S., 1997, A Heart Sound Segmentation Algorithm Using Wavelet Decomposition , International Conference IEEE Engineering in Medicine and Biology Society, Chicago, USA
Zaks, Rodnay & Lesea, Austin. 1993. Microprocessor Interfacing Techniques. Third Edition. Prentice-Hall, Inc., USA