Thursday, 17 April 2014

hybrid energy system



hybrid system refer to a home wind or solar power system that can be connected to a national grid system,  hybrid system is many advantages over signal power generation because it combine wind, electrical, solar and photovoltaic technologies in a single one.
in many area when the wind pressure is greater in one season and solar is less, or solar is greater and wind is less, etc hybrid system is the best option for these areas, for the time when neither the wind neither the solar system are , most hybrid system provide power through batteries or engine generator using fuels such us diesel etc, if batteries low then generator provide the power.
many system are stand alone system which operate off grade, i.e not connected to any system, to store the power which is produces its advisable to purchase batteries, and a charge controller.power condition equipment , safety equipment , metering and instrumentation.

DO YOU KNOW

DO YOU KNOW 
In Turkish, the bird we call a Turkey is called "Hindi" ("from India"). In India, it's called "Peru." In Arabic, the bird is called "Greek chicken"; in Greek it's called "French chicken"; and in French it's called "Indian chicken." The bird is indigenous to none of these places.

Wednesday, 16 April 2014

Projectable Virtual Keyboard.


Projectables Virtual Keyboard.
The device simply projects the laser image of a keyboard onto a plane surface. Just type on that keyboard
projection keyboard is an  input device  of a computer whereby the image of a virtual keyboard is projected onto a surface: when a some one  touches the surface covered by an image of a key, the device records the corresponding keystroke.
its was first invented by IBM engineer  in 1992,
in this keyboard a sensor is used which convert the movement of the finger into identical action by using software , in some keyboard infrared rays is used over the surface of the light , when some one tough the virtual button , infrared rays reflect from the finger of the user and back to the projector, which passed through an infrared filter and on the way is pass through a camera which measure the angel at which these infrared rays were reflected and sense back by the projector, which use a software and identify the virtual button which was press by the user. the diode used in it is infrared red laser diode and the sensor is CMOS sensor chip.
user can connect this virtual keyboard to computer by either usb or through usb port.

Request a new IP address from your ISP server

Here's how to do it in windows:
1. Click Start
2. Click run
3. In the run box type cmd.exe and click OK
4. When the command prompt opens type the following. ENTER after each new line.

ipconfig /flushdns
ipconfig /release
ipconfig /renew
exit
5. Erase your cookies in whatever browser you are using.

Frequently you will be assigned a new IP address when this happens. Sometime you will, sometimes you will not. If you are on a fixed IP address, this method will not work. If this works for you, you may want to save the above commands into a batch file, and just run it when you need it.

Tuesday, 15 April 2014

how to calculate electrical bill of your home

                             
let us suppose your home load(fan,bulb etc) connected to the main supply , remain on during the following hours .


Time                 No                       Power                            Name

6pm to 12am           1                               1000w(1kw)                             Air conditioner 
6am to 10am           1                               2000w(2kw)                             washing machine 
6am to 9am             5                               100w( 5*100w =1kw)               bulb
   
                        Now the total unit consumed in the given hours will be 
                        E = 1 kw*6 hour + 2 kw*4 hour + 1 kw*3 hour =17kwh = 17 units 
if the electrical unit supply to you, by an electrical company at a rate of 2$/unit, then your exist electrical bills during the above hour will be 17 units*2$ = 34$ daily 
and your electrical bill for the whole month will be 17 units* 2$* 30 days = 1020$/months 

Monday, 14 April 2014

Digital shoes



Digital Shoe.
It talks when you walk. This shoe has DVD player, speaker, USB port and headphone facilities.
You can play music from memory card by USB port..
it was first announced by NIKE On wednesday,NIKE + basketball shoes is equipped with pressure sensor that sense/collect data and send it to the smart phone, four different sensor are used at the tip of the toes , in the sole, heel of the  foot, that sense the pressure, acceleration and thus speed, power and vertical jump can be easily determine in games etc...

DOZER


Dozer 

DOZER 
A dozer is a machine equipped with a substantial metal plate used to push large quantities of soil , sand , rubble etc.
 COMPONENTS
THE TRACTOR
 THE  ENGINE
 THE TRACKS
 THE  BLADE

 
THE TRACTOR 
It encompasses the cab where  
the controls are located.  


THE ENGINE 
They are high powered diesel engines, mainly because of the torque necessary to move through very rough terrain.

THE TRACKS 
located on either side of the body, are made up of heavy metal links that create powerful traction.

THE BLADE
  Located at the front of the tractor , and is able to lift 
    the blade up and down.


Types 
 Wheel Dozer
 Crawler Dozer


Tasks 
 Stripping/spreading topsoil and materials
  cut and fill
  stock pilling
  bulk excavation


Capacities
They are available in various hp capacities