Thứ Tư, 21 tháng 9, 2016
http://mcu.banlinhkien.vn/threads/do-khoang-cach-su-srf05-voi-at89s52-hien-thi-len-lcd1602.42/
Đo Khoản Cách Bằng Sóng Siêu Âm
Thứ Bảy, 21 tháng 5, 2016
Thứ Bảy, 16 tháng 4, 2016
Thứ Sáu, 15 tháng 4, 2016
CÁC PHÍM TẮT THÔNG DỤNG BẠN NÊN BIẾT KHI SỬ DỤNG WEB: * Nếu một đẹp trời nào đó bạn đang lướt web hay đang sử dụng một trang web quan trọng nào đó mà bạn lỡ tay tắt nó đi thì bạn đừng lo với các phím tắt thông dụng này thì chuyện khôi phục lại là vô cùng dễ dàng với bạn phải không nào *
Quản lý thẻ và cửa sổ:
·
Ctrl
- T: Mở một thẻ mới
·
Ctrl
- N: Mở một cửa sổ
mới
·
Ctrl
- W: Đóng thẻ hiện
tại
·
F5(kèm Fn nếu có): Refresh trang hiện tại
·
Ctrl
- L: Highlight thanh
URL bar
·
Ctrl
và +: Zoom in
·
Ctrl
và -: Zoom out
·
Ctrl
- 0: Quay trở lại mức
zoom mặc định
Điều hướng:
·
Ctrl
- [: Quay trở lại một
trang nào đó
·
Ctrl
- ]: Di chuyển xuống một
trang
·
Spacebar: Di chuyển trang xuống
·
Home: Nhảy lên trên đầu trang web
·
End: Nhảy xuống cuối trang web
Khôi phục trang vừa tắt: Ctrl - Shift - T
MẠCH NGUỒN CÓ ĐIỀU CHỈNH SỬ DỤNG LM2576-ADJ
Mạch nguồn LM2576-ADJ đã test và chạy ổn định
NOTE:
+ Đây là mạch nguồn DC không phải AC. Nếu bạn nào cấp nguồn AC thì IC sẽ bị bốc khói
+ Mạch này nếu cấp trực tiếp nguồn DC thì chỉ được cấp nguồn +5VDC đến +12VDC nếu cấp lớn hơn thì tụ Cin sẽ bị nổ
+ Nếu muốn cấp nguồn AC cho mạch thì ta chỉ cần mắc thêm một bộ chỉnh lưu cầu để lấy nguồn ra DC. Ngoài ra cách này cũng sẽ giúp cho mạch an toàn hơn.
+ Nếu muốn hỏi gì thêm cứ để lại comment hay ibox qua sđt này: 01683457284 mình sẽ giải thích thêm hoặc các bạn vào google tra datasheet của LM2576-ADJ sẽ hỉu rõ hơn
10 BÀI VIẾT ANH VĂN B
Test 1: Children
spend too much time watching television
“Children spend too much time
watching TV”
In modern society, it seems that
children spend lots of their time watching television. In my opinion, this
bad habit has extremely negative influences on children as followings.
Firstly, watching too much television means that children have less time for studying.
When a child spends more than three hours daily sitting in front of the TV,
he may not have enough time to do his homework. As a result, his scores can
be lower than others. Secondly this habit also causes many problems with the
eyes such as being short sighted or long sighted, and even heart problems. I
have a five-year-old niece, she watches TV so much. As a result of long time
in front of TV, she is badly short –sighted. She can’t read and see anything
even though she is very young. Last but not least, children spend too much
time watching TV because their parents always go to work to earn money. They
just care for earning money but spend their time playing and talking with
their children.
In conclusion, I believe that television has negative effectiveness on the children. Therefore, it’s so important for parents to educate their children to spend time on other activities or play with their children. |
Test 2: Advantages and disadvantages of travelling by car
In modern world, we cannot imagine a
life without cars. However, cars also have a lot of disadvantages and
disadvantages. The first advantage is our life become convenient. In the
past, people did not have car, they used animals for journey or
traveling. Thus they wasted a lot of time. Secondly, cars are very fast
and comfortable. We can use air condition for having fresh air. We can hide
from the sunlight and make ourselves feel com fortable in cars.
On the other hands, there are some
disadvantages. Having a car is costly. Car is not a cheap vehicle, we have to
pay much money to buy one of them. In addition, we must buy other thing such
as petroleum, and new wheels for our car. Final disadvantage is pollution.
Because there are many cars in our street and all of them are using
petrolium. It makes our climate become more and more polluted.
In summary, although car has
disadvantages, we cannot stop using of them. We can just try to improve them,
find green fuel and using it instead of harmful fuel.
|
Test 3: What can young people do to help protect and improve their local
environment.
There are many things young people
can do to protect and improve their local environment. Some of them are
recycling, using cars less, and planting trees. First of all, they can make
sure that things such as plastic containers, glass bottles and newspapers are
recycled. They can pick up any litter they find in the street and put into a
rubbish bin. Secondly, nowadays the air is polluted because too many people
use cars, even to go very short distances. Young people can try use public
transport, walk or cycle to their destinations instead. Finally, they can
help to make their local environment greener by looking after public parks or
gardens. They can also plant trees in their gardens. In summary, we will all
have a better future if young people help to protect and improve the
environment.
|
Test 4: It is always better to
work as part of a team than to work on your own
Obviously, every person has his own
attitudes, some likes to work alone, and other likes to work on a team.
However, I prefer to work with group of people in a team, because I can have
the chance of sharing knowledge and having fun with my team.
The first reason is sharing
information and exchanging the knowledge. When working in a team, I can have
chances to share and discuss knowledge and experience with each other.
Therefore, working in team is more useful and successful. The second reason
is that we can have have good time performing any duties at work. Because
when we work in team, we can have funny stories and tell jokes in order that
we don’t feel tired and bored during work.
All in all I prefer to work in a
team, because I believe that makes me happy and I can share my knowledge with
them.
|
Test 5: Advantages and disadvantages of shopping online
The growth of online
shopping has greatly improved life of the consumer. Many companies today
offer their products online, so that customers can buy them from their own
homes. Some people may be afraid of buying things online; however, others
find it very convenient because it is fast and gives a variety of offers.
There are several disadvantages to online shopping. First of all, it can be
quite risky. Because when we shop online, some information and also our
account can be hacked. In addition, you may not be able to return the item or
get a refund. On the other hand, there are many advantages to shopping
online. The greatest benefit of online shopping is that we can save our time.
We can stay at home to buy the products. What is more, online shopping is a
very quick way to buy whatever we want from all over the world. In my view,
online shopping has many advantages and a few disadvantages. I think that
it’s good if we know to protect ourselves from online shopping.
|
Test 6: There is no place like home
The sentence “there is no place like
home.” This saying always makes a deep impression on my mind whenever I think
of it.. My home isn’t just a place where I sleep and eat; it’s a gathering
place for my friends and family. It’s a place where I don’t have to hide my
emotions, because everyone who’s ever there are those who care about me. I
can be myself, and I don’t have to worry about what other people think about
me. When we think of home, we stop and think for a second, what would our life
be like without our home? No home means no shelter, no shower, no bed, and
nowhere to feel truly safe. Our life will be not meaningful. No matter how
many homes I have in my life, I know that the feeling I have at home will
never change, because of my family.
In a word, I really love
my home and it’s a great place for me to live for good with my parents,
sibling’s love, care and protection.
|
Test 7: The difficulties in learning English and how to overcome them
Learning English is very
important for everyone; however, it also has many difficulties. I personally
have some difficulties in learning English such as: pronunciation, English
grammar, and writing. But I have my own ways to overcome these troubles.
English pronunciation is my first obstacle. The pronunciation in English
puzzles me a lot because the same letter has different sounds. For example
the letter “a” in “bath” is not pronounced in the same way of that in
“bathe”. In order to solve this puzzling question I carefully study The A.P.A
(The International Phonetic Alphabets) which helps me pronounce English words
correctly. The second difficulty is grammar. It took me a long time to learn
how to master the tenses in English grammar. I try to learn and do exercises
day by day, then I answer the difficult questions by myself. In writing English, English
language has its own style. In order to drill writing skills, I have tried to
read famous novels and stories in english. After long and hard years of
English study, I feel please when I can read, listen and speak english well.
|
Test 9: Why is it necessary to learn english?
English is the most international
language. Many people all over the world use English in fields of life. Thus
learning English is very important and vital. The first reason, it is spoken
as a native language in the United States, Britain, Australia and etc. It is
also used as a second language in the remaining parts of the world. Therefore
English is an important language to master because it is a gateway to world
scholarship and international trade. Besides in our country, English is the
main foreign language which is taught in schools and widely used in business.
If we know English, we can read various kinds of English books to widen our
knowledge, to communicate with foreigners easily and find good jobs in
foreigner companies easier. In brief, it is necessary for us to know English.
If we know English well, we have a better chance of improving our lives.
|
Test 8: Which do you think is more valuable – health or wealth?
People said that “health
is more precious than gold”. Therefore, I think that health is more valuable
than wealth. The fact is that money is very important in life because money
can help to satisfy most of our basic demands in life. However, money is not
all because there is still one thing that is more important than money. It’s
health. In fact, when we are healthy, we can work and earn a lot of money for
our life. In addition, we can enjoy our life and perform many dreams and
ambitions during our life. A healthy person is certainly optimistic and has
belief in his or her life. Furthermore, if we are not healthy, we may get
some serious diseases that can not be cured, even we have a lot of money with
us. In these cases, money is nothing. With mentioned things, it is clear that
health is more important than wealth.
|
Test 10: What is is
the most thing to do in city
City life is an interesting
place that many people like to live. It has many wonderful things to do. The
first interesting is shopping centers. They are always crowded of people and
producst which make an exciting atmosphere when we are tired and stressfull.
Besides there are nice amusements parks which can help us to relax at
weekends. These places are always considered as the most funniest ones in
city. For example, we can go to Dam Sen or Suoi Tien with our friends at
weekends. In summary, city life is always an interesting place which most
people like to live.
|
TÊN MỘT SỐ LINH KIỆN TRONG PROTUES
Điện trở: res
Biến trở: pot-hg
Quang trở: ldr
Tụ phân cực: radial
Tụ không phân cực: cap
Đi-ốt: diode
Cầu đi-ốt: bridge
Thạch anh: crystal
Nút nhấn: button
Nguồn AC: vsin
Nguồn DC: battery
Rơ le : animated relay model
Led 7 đoạn : 7SEG
Bóng đèn: lamp
Ic ổn áp: 78XX (XX là số V)
Biến trở: pot-hg
Quang trở: ldr
Tụ phân cực: radial
Tụ không phân cực: cap
Đi-ốt: diode
Cầu đi-ốt: bridge
Thạch anh: crystal
Nút nhấn: button
Nguồn AC: vsin
Nguồn DC: battery
Rơ le : animated relay model
Led 7 đoạn : 7SEG
Bóng đèn: lamp
Ic ổn áp: 78XX (XX là số V)
cuộn cảm : inductor
NHỮNG CỤM TỪ HAY SỬ DỤNG TRONG TIẾNG ANH
Take it easy ➡ Cứ từ từ
Let me be ➡ Kệ tôi
What for? ➡ Để làm gì?
Dead meat ➡ Chết chắc
What's up? ➡ Có chuyện gì vậy
Nothing much ➡ Không có gì mới cả
I guess so ➡ Tôi đoán vậy
Don't bother ➡ Đừng bận tâm
No hard feeling ➡ Không giận chứ
This is the limit! ➡ Đủ rồi đó
Don't be noisy ➡ Đừng nhiều chuyện
Piece of cake ➡ Dễ thôi mà, dễ ợt
Poor thing ➡ Thật tội nghiệp
So what? ➡ Vậy thì sao?
So so ➡ Thường thôi
What a relief ➡ Thật nhẹ nhõm
That's a lie! ➡ Xạo quá!
Down and out! ➡ Thất bại hoàn toàn.
Just for fun! ➡ Giỡn chơi thôi.
For better or for worst! ➡ Chẳng biết là tốt hay là xấu.
One way or another ➡ Không bằng cách này thì bằng cách khác
http://news.zing.vn/chau-a-se-hung-sieu-dong-dat-sau-loat-chan-dong-lien-tiep-post642499.html
CHÂU Á SẼ CÓ THỂ HỨNG CHỊU ĐỘNG ĐẤT SẮP TỚI
http://www.yan.vn/neu-thay-chiec-moc-ao-nay-o-khach-san-nha-nghi-ban-toi-hay-can-than-87791.html
Nếu bạn là người thường đi đến các nơi như là khách sạn, nhà nghỉ,...v.v.. thì bạn nên đọc bài viết này
Đăng ký:
Bài đăng (Atom)