How to read color codes from resistors.

The value of the resistor is marked on the body using colors. Every color is different number and you can remember these numbers or you can just use the table on next step. OR there are much resistor calculators that you can use. It's for the laziest people :D . However it's your decision ,and I will show you all ways to calculate resistor value.

Colors

Here is the table with the colors and numbers. As you can see they are:
BLACK: 0
BROWN: 1
RED: 2
ORANGE: 3
YELLOW: 4
GREEN: 5
BLUE: 6
VIOLET: 7
GREY: 8
WHITE: 9
But this is not for all colors. From right to left the second color is multiplier. Digits from the first colors must be multiplied with the number of this color.
BLACK: 1
BROWN: 10
RED: 100
ORANGE: 1000
YELLOW: 10000
GREEN: 100000
BLUE: 1000000
GOLD: 0.1
SILVER: 0.01
And the last color: This is tolerance. Tolerance is the precision of the resistor and it is given as a percentage. For example a 390 resistor with a tolerance of ±10% will have a value within 10% of 390, between 390 - 39 = 351 and 390 + 39 = 429 (39 is 10% of 390).
BROWN: 1%
RED: 2%
GOLD: 5%
SILVER: 10%
NOTHING: 20%

Calculator

Resistor color code calculator
If you are too lazy to think about colors and digits and mat ... this is for you :) :D

Examples

Exemple: If first color is RED ,second is RED ,third is BLACK and the last is SILVER it means:
RED - 2 -- RED - 2 -- YELLOW - x10000 -- SILVER - 10% so...
2 2 0000 +/- 10% * 2 2 0000 so... :D
220000 +/- 22000
This is 220 000 Ohm or 220 kOhm
or 220 000 - 22 000 Ohm or 220 - 22 kOhm
or 220 000 + 22 000 Ohm or 220 + 22 kOhm

How to Copy and Paste
"Copy and paste" is a phrase that, in the computer world, means copying material from one page to another. Material may include text, images, symbols, files, folders, an entire page, or sometimes even an entire disk. Here's how to do it.
Steps
Windows
1.Select the desired text. Highlight the desired text by holding down the left mouse button and dragging across the text you wish to copy.
Note: You can also select text with the keyboard. Place your cursor where you want to begin the selection, hold down the Shift key, and use the arrow keys to select text.
If you're using a smart phone or other touch-screen device, use your finger to drag slowly over the text you wish to highlight.
2.Release the mouse button. When you've selected the entire block of text desired, release your hold of the button.
The text should now be highlighted in your chosen highlight color.
3.Right-click the selected text. A contextual menu will appear.
Select "Copy." This copies the text (places the selected text on the clipboard), where you can take it to another part of the existing document, or even to a different document on a separate application, to paste.
Note: instead of selecting "Copy" from the contextual menu, you can select it from the Edit menu of most applications, or type Control-C. All methods place the selection onto the clipboard.
4.Paste the text. Find where you want to paste the copied text, and click in the document where you want the text to go.
Right click the mouse. A contextual menu will appear.
5.Select "Paste." The copied material will be inserted into the document.
Alternately, you can select Paste from the Edit menu, or type Control-V to paste the contents of the clipboard into your document.
All Operating Systems : Drag and Drop Method
1.Select the text. Using the methods outlined above, select the desired text.

2.Drag and drop it. Click and hold inside the selected text. Keeping the mouse button held down, drag the selected text into its new destination, then release the mouse button

How to Clean a Mousepad
Have a look at your humble mousepad. This little foam marvel provides the space for your mouse to rest on and a good surface for moving across. However, it also collects specks of dead skin, oil and dirt. If it's gray and grimy, it's time for a bath.

Steps
1.Check out what your mousepad is made of. Usually it will be a spongy foam, covered with either a finely knit fabric or a plastic top.

2.Clean it according to the type of surface.

If the surface is fabric, try rubbing gently with a moist washcloth or rag and a bit of shampoo. Shampoo is a mild cleaner that's gentle on most fabrics and on skin, plus you already have it.
If your mousepad is plastic-covered, use any mild spray household cleaner and a cloth or sponge. Dish soap or shampoo will work just as well.
3.Rinse all the cleaner off the mousepad.
4.Pat the outside of the mousepad dry.
5.Allow the mousepad to dry thoroughly. Let it dry all the way through the foam before returning it to your desk.

How to Save Your Computer Accessories
Did you ever wonder what would happen if your computer suddenly broke down? Here are several small steps you can take to help ensure your computer accessories will continue running smoothly for years to come.

Steps
1.Do not bang on your keyboard. When you type, lightly tap the keys instead. Not only will this ensure that your keyboard lasts much longer, it is also better for your fingers and wrists.

2.Take care of your mouse. Do not pick it up and drop it, especially if you have a digital mouse, as this can move the sensor out of place. Clean your ball mouse if you have one:

Turn your ball mouse upside-down and unscrew the cap;
Take out the ball;
Take a toothpick, cotton swab, or your finger, and clean off the three (3) small long rings inside of your ball mouse. Turn each ring slowly several times to make sure there is nothing left on the rings.
Replace parts and use the ball mouse again.
3.Take care of your speakers. When turning up volume, do it gently. Make sure the speakers are away from edges, so that they do not fall off the sides, which can badly damage them. Keep them away from heat sources as well.
4.Take care of your monitor. Make sure you have your screen saver turned on. If you use your computer often, consider setting the time to two-three (2-3) minutes before the screen saver comes on. Clean your screen at least once a week. Other ways to keep the monitor in good condition include:

Turn off your monitor at night or when not in use.
Take a window spray, such as Windex, and lightly spray it on your screen.
Immediately wipe screen vertically with a newspaper, or any other soft cloth that you may prefer. (Do not use paper towels, as they can scratch the screen, and small pieces can break off which, if not removed immediately, dry on your screen.)
5.Clean the computer. Use an appropriate cleaning product, such as a can of dust remover to spray to clean your computer parts. Parts should include: mouse, keyboard, speakers, modem, etc. To spray the mouse, simply remove the cap and spray in the hole for three-five (3-5) seconds. To spray the keyboard, simply turn your keyboard upside down and gently shake for several seconds. This will remove any large debris that may have gotten caught in your keyboard. Then simply tilt your keyboard at a 45 degree angle, and spray down each row of keys.
6.Clean out your modem.
Shut down your computer completely.
Remove all cords from the back from the modem.
Remove the outside casing from your computer. Look in your computer manual for further instructions on how to do this.
Spray all chips and parts in your computer. Warning: do not touch the chips with your hands, as this can badly damage them. If easily accessible, use dry cotton swabs to clean the fans and metal casings.
Replace all parts and cords, and start your computer.
7.Protect your computer. If you have small children in the house, you should always keep your computer up high and away from the edges, so that there are no dangers of any parts falling on them. If you cannot place your computer out of the way of small children, place a small child-safety fence in all doorways surrounding the computer, or a small fence around your computer/computer desk.

How to Use a Computer Mouse
Do you continually 'miss' your target link when browsing the web? Well, don't worry. Though it may seem confusing or difficult at first, you can learn how to operate a mouse with these easy steps and tips.
Steps
1.Connect the mouse. If you drag it around the arrow on the screen should move around with it. If not, you may have a technical problem. Sometimes the arrow will dart around in spurts, or will move too slowly. The former will require troubleshooting (probably downloading a driver) and the latter can be adjusted in your computer's settings. If this doesn't work, consider using a wrench to open your mouse and remove any broken objects.

2.Mice (more than one mouse) can be used by either hand. If you are left handed, you can just place the mouse on the other side of the keyboard, if it reaches. The mouse will work the same.
3.Hold the mouse correctly. For Windows or PC users, place your pointer finger on the left button, and your ring finger on the right button. If your mouse has a button or 'wheel' in the middle, your middle finger can operate this. For Mac users, the mouse usually has only one button. Use any of your three center fingers to press the button.
4.To click, press the button (usually the left one, when there are two) and promptly release it. It should be a firm, quick tap, and the mouse should be still when you do it.
5.To double click (for opening applications, documents or folders), you must click (the left button) twice in rapid succession. If you have physical trouble with the required double click speed, your computer can be adjusted to suit your needs.
6.To drag files, press and hold the (left) button, then move the mouse without letting the button go until the file is where you want it to be.
7.Use mouse gestures. When you feel more confident you may like to set up mouse gestures.