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In the E12 series each succeeding resistor falls within the -/+ 10 % of the previous value. Until fairly recently, 10% tolerance resistors were the norm, but today, 5% (E24) resistors seem to be the most commonly used. They still can be found in vintage radios, old amplifiers, etc., but the price of a 5% resistor is low enough to be the standard component in all of today's electronic circuits. In precision applications, special, more expensive low-tolerance resistors are used with tolerance ratings of 2% , 1% or less.
E12 series - resistor color code examples
The Technical Data Archive contains information including component theory, colour codes, conversion charts and more. All the articles can be accessed from the index below. The 'Pin-Out' section has pin connection and package details for connectors and components. Each article includes pin assignments, applications, assembly instructions and more, and can be accessed from the main menu or the link below. The information here is added to and updated occasionally, so bookmark Electronics 2000 now by clicking here and check back often. Unfortunately we cannot provide semiconductor datasheets, but try searching on the Farnell or RS web sites.
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Seeking Wisdom
Get the Grammar Right I had a little meltdown this week after reading about 30 of those silly pictures on Facebook that people put the funny captions on… well, they would be funny if they were grammatically correct. I just couldn’t take it any longer, so I had to post a comment. Then, today, I saw this very cool graphic from the great folks at makeuseof.com and thought I’d share it here.
As a teacher, I’m always on the lookout for new and interesting ways to promote learning in my classes. As a geek, its cool to find ways to do that with technology. I recently found out about an awesome website, Merlot.org , that serves as a place for teachers of all disciplines to share lessons and information. During my review of that site, I found a few games that will help students learning the basics of electronics reinforce that information.
Seeking Wisdom » resistor color codes
Graphical Resistance Calculator
This JavaScript-based web app comes from my JavaScript Bible books (dating back to the very first edition with a few upgrades a long time ago). Although I have removed other book examples from this web site, this page remains the most popular destination within dannyg.com — presumably as a resource for students of electricity/electronics and my fellow radio geeks. Enjoy! Illustration Copyright 1996 Danny Goodman (AE9F).