You can know a resistors resistance by just taking a look at the lines it has.

**1st. & 2nd.** lines indicate its

**Value**.

**3rd.** line indicates the

**Multiplier**, so you multiply the resistor's Value by Multiplier and you'll know resistor's resistance.

**4th.** line indicates

**Tolerance**, resistor's resistance isn't exact, it can be the same, more or less depending on it's Tolerance. So don't think somebody sold a bad resistor if you bought a 470ohm with +/-5% tolerance and you find it's 490ohm, this resistor is between its tolerance (493,5ohm & 446,5ohm)

You have a table at bottom that shows you Values, Multipliers and Tolerances

Example:Green - Blue - Red - Gold

5 - 6 - x100 - +/- 5%

So this resistor would be 5.600ohm with +/- 5% tolerance (5.880ohm - 5.320ohm)

Some times it's hard to know resistor's resistance by its colour, so I'll give you some tips to make it easier.

1) 1st. line cannot be Silver nor Gold

2) 2nd. take a look at the

**Normalized Values** and check if what you see can be posible.

If you have an ohm-meter and you wish to know resistor's resistance don't hold both extremes of the resistor with your hands, you'll change it's resistance. You can just hold one of the extremes and just put the tester lead on the other extreme without touching it.

**Normalized Values**, you will only be able to find these

**Normalized Values X Multiplier**. For example you won't be able to find a 450ohm resistor, you'll have to use a 470ohm resistor (47 X 10).

**Resistors With 5 Lines**, in that case the first 3 lines are

**Value**, the 4th line is

**Multiplier** and the 5th line is

**Tolerance**Get this useful Resistor Calculator made by X24

http://mywebpages.comcast.net/x24/prog_LEDcalc.htm **Normalized Values** 10

12

15

18

22

27

33

39

47

56

68

82

91

1 = 1 = Ohm

1.000 = 1K = Kilo Ohm

1.000.000 = 1M = Mega Ohm