{"id":27,"date":"2013-01-18T00:00:00","date_gmt":"2013-01-18T00:00:00","guid":{"rendered":"https:\/\/danielepais.com\/journal\/2013\/01\/18\/resistors-color-code-explained\/"},"modified":"2022-02-03T14:25:21","modified_gmt":"2022-02-03T07:25:21","slug":"resistors-color-code-explained","status":"publish","type":"post","link":"https:\/\/danielepais.com\/journal\/resistors-color-code-explained\/","title":{"rendered":"Resistors color code explained"},"content":{"rendered":"

\"Resistors<\/p>\n

The most common<\/a> type is the 1\/4W 5%carbon film resistor. To read the value, see the chart above.<\/strong><\/p>\n

Resistors are the most commonly used component in electronics and their purpose is to create<\/a> specified values of \u00a0current and voltage in a circuit.<\/p>\n

The unit for measuring<\/a> resistance is the OHM. (the Greek letter \u03a9 – called Omega). Higher resistance values are represented by “k” (kilo-ohms) and M (meg ohms). For example, 120 000 \u03a9 is represented as 120k, while 1 200 000 \u03a9 is represented as 1M2. The dot is generally omitted as it can easily be lost in the printing process. In some circuit diagrams, a value such as 8 or 120 represents a resistance in ohms. Another common practice is to use the letter E for resistance in ohms. The letter R can also be used. For example, 120E (120R) stands for 120 \u03a9, 1E2 stands for 1R2 etc.<\/p>\n

Here is a quick explanation on how to<\/a> calculate the value of a resistor according to the colors of its bands.<\/strong>
\ne.g. A resistor with the colours\u00a0YELLOW, VIOLET, BROWN, GOLD<\/strong>.<\/p>\n

First band is\u00a0YELLOW<\/strong>, which you can read as a value of 4<\/p>\n

Second band is\u00a0VIOLET<\/strong>, which you can read as a value of 7<\/p>\n

Third band is\u00a0BROWN<\/strong>, this indicates a multiply x10<\/p>\n

Now put these figures together and you will have the follow:<\/p>\n

4 7 x10 = 470\u03a9, (\u03a9 is the symbol used for ohms, the measure of resistance).
\nFourth band is\u00a0GOLD<\/strong>, which will give you a\u00a0tolerance\u00a0of 5%<\/p>\n

That said, let’s imagine that we want to calculate the resistor needed to go alongside an led diode.\u00a0<\/strong><\/p>\n

For example, given a 9-volt battery, and a 2-volt LED with a maximum current of 30 ma, the required resistance R is (9 V — 2 V)\/0.03 A = 233 ohms. Note that milliamps must be converted to amps by dividing by 1000. Also, the absolute minimum R should be avoided, it is preferable to use a 240-ohm, 330-ohm or higher valued resistor instead.<\/p>\n

That’s it for today, this was part 1 of the Basic components, on part 2 we will talk of capacitors.<\/p>\n

\n
\u00a0<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

The most common type is the 1\/4W 5%carbon film resistor. To read the value, see the chart above.<\/p>\n","protected":false},"author":1,"featured_media":1996,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[224],"tags":[119,123,116,121,122],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t