Douglas Adams

We are stuck with technology when what we really want is just stuff that works.

Albert Einstein

It has become appallingly obvious that our technology has exceeded our humanity.

Jose Manuel Rodriguez Delgado

Can you avoid knowledge? You cannot! Can you avoid technology? You cannot! Things are going to go ahead in spite of ethics, in spite of your personal beliefs, in spite of everything

Sergey Brin

Technology is an inherent democratizer. Because of the evolution of hardware and software, you’re able to scale up almost anything. It means that in our lifetime everyone may have tools of equal power.

Douglas Adams

Most of the time spent wrestling with technologies that don't quite work yet is just not worth it for end users, however much fun it is for nerds.

Saturday, May 17, 2014

Not showing My Computer Icon on Desktop in Windows 8 & 8.1

My computer icon is most important icon in windows operating system. In previous Operating Systems, like Windows 7 and Windows XP you can go to start menu and Right click on My computer icon and Show on Desktop for My Computer icon to show it in desktop. But the traditional start menu also missing in Windows operating systems, therefore ‘Show on Desktop’ is not available here.

How to Show My Computer Icon on Windows 8.1 & 8 Desktop
It is easy and few steps, I’ll be explaining the steps by steps with screen print.

   1. Right click in any empty space on the Desktop and click Personalize from the popup menu.


   2. Change desktop icons link on the left pane.


3. On the Desktop Icon Settings dialog box, select the Computer check box so there is a check mark in the box and ok. you can use this method such as the Control Panel and Recycle Bin. 


Now you can see your My Computer icon on your windows 8 Desktop. 

Thursday, May 15, 2014

Practical Resistor value calculation

Resistor is a passive electrical component that reduce flow of electrical current in an electronic or Electronics circuit. resister has a linear IV ( V=IR ) characteristicmeaning that the voltage across the resistor is directly proportional to the current through the resistor.
Resisters's 103 Symbol

 Resistor In Ohms  Unit  Symbol
 1  Ohm      Ω
 1,000  Kilo Ohm     KΩ
 1,000,000  Mega Ohm     MΩ
Resistors practical value

Resistors only come in specified values. These values are spread across multiples of ten.

1.21.5 1.8 2.2 2.7 3.3 3.91 4.7 5.6 6.8 8.2
After that, the cycle repeats, but a power of ten higher.

Resistor Color code

Color
Significant figures
Multiplier
Tolerance
Black×100
-
Brown1×101±1%
Red2×102±2%
Orange3×103
-
Yellow4×104
-
Green5×105±0.5%
Blue6×106±0.25%
Violet7×107±0.1%
Gray8×108±0.05%
White9×109
-
Gold×10-1±5%
Silver×10-2±10%
None
-
-
±20%

Example Calculation
Eg 1
Red      Red    Orange   Gold    
  2               2            000        ±5% 
  22000 Ω  ±5%    Or    22 KΩ

Eg 2
Blue      Gray   Brown    Silver
  6                8            0            ±10% 
  680 Ω  ±10% 

Power rating Of Resistor 
  power rating of a resistor is the specification given with a resistor that serves to tell the maximum amount of power that the resistor can withstand. When current passes through Resistor, it normally generates heat. there for we have to find suitable wattage resistor for the Electronics circuit.
 Let's look at examples of resistors and the power ratings we would need for them for you to get a practical idea:

Resister Value                    820 Ω
Resister between Voltage     12V

P = V2 / R

P =12 x 12 / 820
p = 0.1756

1/4 watt resistor would suffice and be suitable for the circuit

The common standard power ratings of resistors are 0.25W, 0.5W, 1W, 2W, 5W, 10W and 25W. So the circuit designer must choose accordingly for the circuit.

Resistor Watt range with physical size