resistor - is the most common element embedded into any electronic circuit.It can be seen everywhere, from the simplest to the washing machine and the modern computer.To indicate their properties used two types of layouts: the first - by the resistor color code marked on the colored rings, the second - alphanumeric.
landmark designation
In cases of resistors and capacitors relatively large size of their nominal resistance (capacitance) is marked using abbreviated notation standard measurement units, and next - the probable deviation from the declared nominal value, such as 1.5% 10 ohms, 33 ohms 20%.Such values encode a resistor color code.Encryption small denominations of products consists of a special set of alphanumeric characters.But at the same today universally applied mnemonic code that is colored rings that make up the color-coded resistors.According to this system, unit coded letter ohms resistance (E), 1000 ohm - both (R) megohms - is (M).The nominal capacity of 100-910 ohm resistors represent a fraction of kiloomah, and the range of 100000-910000 - megohms.In case of a nominal resistance integer lettering placed after figures - ZZE (33 Ohm), 1 M (1 M).Record decimal places less than one alphabetic marks before the number, for example, M47 (470 kW).And in the case of a decimal fraction, the letter is written instead of a comma after: 1E5 (1.5 ohm), 1M5 (1.5 MW).Always present the tolerance mark in the track caused to resistance: 5%, 10%, 15%.Colour coding resistor can combine both types of markings.
color coding
It is marking the outer shell of the device with the help of 3 or more colored concentric strips.Each color has a certain way to a numeric value, the characteristic of the resistor.Usually, the last strip of prescribed magnitude of the alleged tolerance of the product and the first strip of talk about resistance.For example, labeling with four stripes encode the first two container size (ohm) and the third serves as a multiplier for said value.Colour coding of resistors can be decrypted if the product is positioned so that the wide band and follow it all the rings were close to the left hand.Then you need to take advantage of the comparative tables, which help to clarify the value differences inflicted.
Other standards
color marking of imported resistors not all so simple leaves.The fact that domestic production is used for its labeling, and for foreign - another.Some manufacturers and do change their standards, creating its own color scheme.Unusual markings used to distinguish those products which are manufactured in accordance with the requirements of MIL, which differs from the notes of industrial and domestic purposes, may report the properties of fire resistance, etc.For example company "PHILIPS" indicates the value of resistors as it is accepted everywhere, ieearly figures show performance in ohms, and the last - this is the multiplier.Depending on the application accuracy of the resistor it is treated as a symbol 3-4.The differences from the ordinary encoding lie in the semantic content of the 7, 8 and 9, the last digit.
