(no subject)
Немного о маркировании резисторов. Интересно.
What are those markings, and how do I read them?
The markings on a resistor show its resistance value in ohms. The traditional through-hole resistor is marked with color bands, as shown below. Some resistors show their value in numbers, including Mil-spec resistors, which have their own special code.
What do the colors mean?
Each of the color bands have a specific meaning. The first two colors give the base value of the resistor; the next gives the multiplier, and the final band the tolerance. If a resistor has five bands, it is a more precise resistor, in which the first three bands represent the base value, and the fourth and fifth represent the multiplier and tolerance, respectively.
In order to read the color markings, you need to know what colors stand for what numbers. Here is a table showing you each color and it's respected value/multipler:
Color Value Multiplier Tolerance BlackZero (0)x 1-- BrownOne (1)x 101% RedTwo (2)x 1002% OrangeThree (3)x 1,000-- YellowFour (4)x 10,000-- GreenFive (5)x 100,0000.5% BlueSix (6)x 1,000,0000.25% VioletSeven (7)x 10,000,0000.10% GreyEight (8)--0.05% WhiteNine (9)---- Gold--x 0.15% Silver--x 0.0110% None----20% In our example above, the first band is red, which represents the number two (2). The next band is violet, which is seven (7). The multiplier is yellow which is x 10,000, while the tolerance is silver, which represents a tolerance of 10%. Therefore, the value of the resistor is 27 x 10,000, or 270,000, or 270k, with a tolerance of +/-10%.
Is there an easy way to remember the colors?
People often remember the colors by using mnemonics--a saying with a seperate word representing each color in the code. These sayings are often crude, and possibly sexual in nature (Aside: People tend to remember crude sayings better that clean sayings. Why? Ask a psychologist!) Here are a couple mnemonics for the resistor color code:
Bad Booze Rots Our Young Guts But Vodka Goes Well
Barbara Brown Runs Over Your Garden But Violet Grey Won't (courtesy of Mike Tomlinson, from Usenet)
Bad Boys Rape Our Young Girls But Violet Gives Willingly -- Get Some Now
(This one is special in that it includes the standard tolerance codes of Gold, Silver, and None.)
Bachelor Boys Rush Our Young Girls But Veronica Goes Wild for Silver and Gold
(This one also includes Silver and Gold, although some might argue in the wrong order.)
Bad Boys Rape Our Young Girls Behind Victory Garden Walls
What are those markings, and how do I read them?
The markings on a resistor show its resistance value in ohms. The traditional through-hole resistor is marked with color bands, as shown below. Some resistors show their value in numbers, including Mil-spec resistors, which have their own special code.
What do the colors mean?
Each of the color bands have a specific meaning. The first two colors give the base value of the resistor; the next gives the multiplier, and the final band the tolerance. If a resistor has five bands, it is a more precise resistor, in which the first three bands represent the base value, and the fourth and fifth represent the multiplier and tolerance, respectively.
In order to read the color markings, you need to know what colors stand for what numbers. Here is a table showing you each color and it's respected value/multipler:
Color Value Multiplier Tolerance BlackZero (0)x 1-- BrownOne (1)x 101% RedTwo (2)x 1002% OrangeThree (3)x 1,000-- YellowFour (4)x 10,000-- GreenFive (5)x 100,0000.5% BlueSix (6)x 1,000,0000.25% VioletSeven (7)x 10,000,0000.10% GreyEight (8)--0.05% WhiteNine (9)---- Gold--x 0.15% Silver--x 0.0110% None----20% In our example above, the first band is red, which represents the number two (2). The next band is violet, which is seven (7). The multiplier is yellow which is x 10,000, while the tolerance is silver, which represents a tolerance of 10%. Therefore, the value of the resistor is 27 x 10,000, or 270,000, or 270k, with a tolerance of +/-10%.
Is there an easy way to remember the colors?
People often remember the colors by using mnemonics--a saying with a seperate word representing each color in the code. These sayings are often crude, and possibly sexual in nature (Aside: People tend to remember crude sayings better that clean sayings. Why? Ask a psychologist!) Here are a couple mnemonics for the resistor color code:
Bad Booze Rots Our Young Guts But Vodka Goes Well
Barbara Brown Runs Over Your Garden But Violet Grey Won't (courtesy of Mike Tomlinson, from Usenet)
Bad Boys Rape Our Young Girls But Violet Gives Willingly -- Get Some Now
(This one is special in that it includes the standard tolerance codes of Gold, Silver, and None.)
Bachelor Boys Rush Our Young Girls But Veronica Goes Wild for Silver and Gold
(This one also includes Silver and Gold, although some might argue in the wrong order.)
Bad Boys Rape Our Young Girls Behind Victory Garden Walls