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Feelings on Saxophone Tenor (Cover, Morris Albert)

Silakan menikmati hasil rekaman saya.

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Wonderful ToNight on Saxophone Tenor and Sopran (Cover, Eric Clapton)

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Ayah on Sopran Saxophone (Cover, Song: Rinto Harahap)

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Hasil review saxophone alto YAMAHA-YAS 280

Saya mencoba menguji suara saxophone alto YAMAHA tipe YAS-280

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When You Tell Me That You Love Me on Tenor Saxophone (Cover)

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Bunga Anggrek dimainkan dengan Saxophone Tenor dan Alto

Mencoba irama keroncong dimainkan dengan saxophone Tenor dan Alto.

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Arduino tutorial: 8 LED simple flasher using looping

Examples of Arduino program here that has just been posted here. Simplified the program by adding a loop instruction that is: for ().
Because the digital pin to 8led is D2 .. D9, then the instruction pinMode (), digitalWrite, and delay () can be inserted into the looping of for() instruction.
More programs like the following:

Program can be explained as follow:

  1. On setup(), using looping for() defined n variables as series 2,3,4,5,6,7,8,9. thus, Inside looping of for(), function of pinMode() and digitalWrite() instructions executed for pin of digital as number of 2,3,4,5,6,7,8,9.
  2. Inside function of loop(), each led of digital pin turn on about 100ms. Thus do not need to write down instructions repeatedly, for each LED.

Once the compiled binary code becomes smaller when compared to the previous tutorial.

Having executed the same result as the following video.

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Source can be downloaded here.

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Neuro-Fuzzy and Soft Computing: Jyh-Shing Roger Jang


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Tugas S2: Advanced Power System

Saya mau sharing hasil pekerjaan, tugas saya saat masih kuliah S2 Teknik Elektro, Universitas Brawijaya, angkatan Th. 2005 atau angkatan kedua. Tugas ini menggunakan matlab sebagai alat bantu metode komputasinya. Jadi anda perlu mengubahnya kedalam scilab jika anda menggunakan scilab.







Ir. Bambang Siswoyo

26 Maret 2006





Ir. Mahfudz Shidiq, MS.






1.    SOAL

 Diketahui diagram segaris jaringan sistem daya seperti yang diperlihatkan dalam gambar 1 berikut ini.

Gambar 1
Diagram segaris sistem daya

Beban sebesar itu dipenuhi oleh dua generator, salah satu generator membangkitkan daya tetap 125 MVA dengan faktor daya 0,8 (100 + j75 MVA) dihubungkan ke bus Elektro, dan satu generator yang lain bertugas sebagai slack bus dengan tegangan 150 KV dihubungkan dengan bus Mesin.


  1. Tentukan tegangan pada 3 bus yang lain dengan metode aliran daya a). fast decoupled. b). Gauss-Seidel Zbus.
  2. Hitung daya yang dibangkitkan oleh generator pada slack bus.
  3. Hitung total rugi-rugi daya sistem.



Untuk memudahkan penggunaan besaran, semua besaran diubah kedalam perunit dengan tegangan mengacu pada generator slack bus pada bus mesin yaitu 150 KV dan daya mengacu pada generator tetap G1 sebesar 125 MVA . Dengan demikian 1PU adalah: 150 KV dan 125 MVA.

Selanjutnya untuk perunit dapat dihitung yaitu:

  • Impedansi dasar =
  • Tegangan dasar = 150 KV
  • Daya dasar = 125 MVA
  • Arus Dasar =                    

Kemudian seluruh impedansi saluran, daya beban dan generator,  tegangan bus dibagi dengan besaran ini.          


  1. 6 + j24 menjadi (6 + j24) / 180           = 0.0333 + j0.1333
  2. 12 + j48 menjadi (12 + j48) / 180       = 0.0667 + j0.2667
  3. 10 + j40 menjadi (10 + j40) / 180       = 0.0556 + j0.2222
  4. 16 + j64 menjadi (16 + j64) / 180       = 0.0889 + j0.3556


  1. 100 + j75 menjadi (100 + j75) / 125   = 0.8 + j0.6
  2. 80 + j40 menjadi (80 + j40) / 125       = 0.64 + j 0.32
  3. 70 + j30 menjadi (70 + j30) / 125       = 0.56 + j0.24
  4. 50 + j15 menjadi (50 + j15) / 125       = 0.4 + j0.12


       150 menjadi 150/150        =


 Diagram segaris sistem daya dalam gambar 1 dapat digambarkan kembali dengan pemberian nomer node, nomer elemen dan arah arus, diperlihatkan dalam gambar 2 berikut ini:

Gambar 2
Diagram segaris sistem daya

 Jika digambarkan kembali dengan metode graph diperlihatkan dalam gambar 3 berikut ini:

Gambar 3
Sistem daya secara graph

Matrik Elemen-node

Dari gambar 3 diperoleh matrik elemen-node sebagai berikut:


 Matrik incident bus A

 Adapun matrik incident bus A, dengan bus 1 sebagai referensi diperoleh sebagai berikut:



>> A = [0 -1 0; 1 -1 0; -1 0 0; 0 0 1; -1 0 1]

A =

     0    -1     0

     1    -1     0

    -1     0     0

     0     0     1

Matrik transpose A


>> At = A.’

At =

     0     1    -1     0    -1

    -1    -1     0     0     0

     0     0     0     1     1

Sampai disini diperoleh variabel A sebagai matrik incident dan At sebagai matrik transpose incident.

Matrik Admintansi Elemen | y |

Berdasarkan gambar 2 dan gambar 3 diperloleh matrik diagonal impedansi z elemen sebagai berikut:

to be continue


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Welcome to my blog

To all my blog visitors, thank you for visiting at address:

My Blog has been activated since: November 30, 2011


  willing to share knowledge to anyone is an expression of love for all mankind

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Visitors today

This blog is a lecturer’s blog at UB (University of Brawijaya) as a facility for ease of informations sharing over the internet. I am a lecturer at UB since 1988 in the electronics department, engineering faculty. About me please click here.

The contents of blogs are written in two languages, namely English and Indonesian. I tried to write into the English language if the content worthy to be read by all visitors.
Please click the Indonesian and English tags to accelerate the search for my blog contents.

The contents of this blog is all that “What I already knew”, “What I have done”, “What I have taken”, “What I like a new thing” as well as: electronics, mechanical, aeromodelling, playing musical instruments, understanding of spiritual, others might.


Willing to share knowledge, willing to provide useful knowledge to anyone, later will get a matchless happiness, that’s the real man who has shed light to all corners of the world. Then this world will become peaceful, beautiful to be enjoyed forever. And all humans will apply only two requests to the god, “oh my God give me long life and health forever.” Humans are given a long life and health forever by his god, he was the one who actually has a real science. These two statements will always be intertwined throughout your life in this world, like the world is always spinning forever. 

—-  (Mid, December 2010) – from my deepest heart, It can never be touched me, but everyday I can feel its presence. 

Yours sincerely

Bambang Siswoyo

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