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Resistor Colour Codes
First lets look at the different colours found on resistor and what values they represent.
Resistors have either 4 or 5 bands of colour on them. The first two (or three in the case of a 5 band one) give the value of the resistor. The next one gives the size of it (or the multipiler) and the last gives the tollorance. Lets have a look a a sample resistor.
We can see that this one has four bands, brown - blue - brown and gold. The first two is the value brown = 1 blue = 6, ie 16. The next one gives the multiplier, brown = 1 ie 10 ohm. 16 times 10 ohm = 160 ohm with gold =5% tolorance. So this is a 160 ohm resistor with %5 tolorance.
Resistors | | | Author | Message | | soumikdandapat
1 | explain the work of resistor. | Anonymous
173 | http://www.kpsec.freeuk.com/components/resist.htm#real | saran.invincible
1 | Generally vin is greater than vout,
but by thge above voltage division rule, it is quite the opposite how come? | Anonymous
173 | resistor is used in ciruit to limit the current | Anonymous
173 | Resistors Have no polarity; they can be installed either way, but often it is best to put them in all facing the same way so as to make reading them easier. | Anonymous
173 | Do they need to be put in a circuit in a certain way (positive, negative)? if so, how do I tell what end from the other? | Anonymous
173 | The answer to this is mainly to do with the tolorance on the resistors. If you have 10-20-30-40....1000, there is not much difference between 990 and 1000 and 990 is well within the tolorance of 1000. So they start with a even number and jump up by the tollorance. For example with 10% tollorance it starts at 10 and the goes 12 (2 = 10% of 10 times by 2), 15, 18, 22, 27, 33, 39, 47, 56, 68, 82 so all the ranges are covered evenly. So 10 cover 9,10,11 and 12 covers 11,12,13 and 15 covers 14,15,16 and so on. | Anonymous
173 | Hey, Why do resistors have odd values like 47k and 56k, but not 50k? Wouldn't it be alot easier to keep them at rounded values?
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