0 write out the following Letters of complaint by inserting the correct verb form and appropriate expressions

A. I will informing that complaints have been received about dogs dirtving the grounds and ground floor lobby. When I investigated , I discovered that the dogs belong to you. I also finding that they have been frightening the children playing in the estate. In view of this , I am sure you are keep your dogs on a leash when they are out in the grounds. To ensure clean premises, I am grateful if you taken them daily to the public park nearby.

B. When I have to write to you about the noise coming from your flat. Your neighbours has inform me that they have difficulties putting their young childern to bed, and with the examinations coming up, they worried that the older childern will not be able to concentrate.
I have you probably did not realize how sound does travel, particularly when the walls and ceiling are thin. If your children to play in the grounds in the afternoon or suggest to them that confine themselves to less boisterous games in the flat, especially at night.. I have co-operation.

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0 Job Application Letter

Depok, December 5, 2011

Attention To:
HRD Manager
PT. Pertamina
Jl. Medan Merdeka Timur No. 1A
Jakarta

Dear Sir/madam,

based on the ads that I read at Media indonesia and Internet that your company is looking for employees to hold some position. I am interested in applying application for position Network Engineering with my background educational as Computer System.

My name is Rado M Jaya , I am twenty two years old. I have graduated from Engineering computer Gunadarma Univercity on October 2011. specification of my ability is Computer Networking and Systems engineering . I consider myself that I have qualifications as you want. I have good motivation for progress and growing, eager to learn, and can work with a team . Beside that I posses adequate computer skill and have good command in English (oral and written).
With my qualifications, I confident that I will be able to contribute effectively to your company. Herewith I enclose :

1. Copy of Bachelor Degree (S-1) Certificate and Academic Transcript.
2. Curriculum Vitae.
3. Copy of Job Training Certificate from Cisco Networking.
4. Copy of Job Training Certificate from Red Hat
5. Recent photograph with size of 4×6

I would express my gratitude for your attention and I hope I could follow your recruitment test luckily.

Sincerely,

Rado M jaya

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0 Rechargeable Battery dan Battery Charger

Rechargeable Battery

Untuk memilih battery, perlu diperhatikan tegangan dan kapasitas battery selain juga ukuran dan beratnya. Tegangan yang dipilih sebaiknya tidak terlalu jauh dari tegangan yang dibutuhkan, hal ini dilakukan untuk menghindari disipasi panas yang terlalu besar pada regulator. Semakin besar perbedaan tegangan, maka daya yang dibuang untuk menurunkan tegangan semakin besar pula. W = VxIxt di mana V = perbedaan tegangan, I = arus yang dibutuhkan dan t adalah waktu.

Sedangkan kapasitas tergantung dari berapa arus yang dibutuhkan oleh robot dan berapa lama robot harus bekerja. Sebagai contoh battery dengan kapasitas 5000mAH seperti pada gambar di bawah ini, battery ini akan menghasilkan arus sebesar 5000mA atau 5A selama 1 hour atau 1 jam.

Untuk sistem mikrokontroler, bila diinginkan sumber daya yang betul-betul terpisah, dapat ditambahkan lagi battery yang lebih kecil kapasitasnya dengan tegangan yang lebih kecil pula seperti battery 6V / 1.3A pada gambar berikut

Battery Charger

Bagian yang tak kalah penting lagi adalah bagian pengisi battery atau Battery Charger. Agar battery yang diisi dapat berumur panjang maka perlu dihindari kondisi memory effect dengan membuang muatan battery terlebih dahulu sebelum proses pengisian dilakukan.

Battery Charger iMax B6AC adalah merupakan battery charger yang selain mengisi, juga dapat membuang muatan battery 0.1 – 1A. Battery charger ini juga dilengkapi LCD untuk monitoring pengisian untuk setiap selnya.

Battery charger ini juga dapat digunakan untuk pengisian battery Lithium Polimer atau Lipo. Selain itu sumber daya dari battery charger ini dapat menggunakan sumber daya AC 100V hingga 240VAC baik 50 atau 60Hz dan juga sumber daya DC 11 – 18 Volt DC

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