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Sketch, simulate, and share your circuits. E12 series - resistor color code examples. In the E12 series each succeeding resistor falls within the -/+ 10 % of the previous value.

E12 series - resistor color code examples

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. Resistor Color Code Calculator. 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.

Seeking Wisdom

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 and thought I’d share it here. Seeking Wisdom » resistor color codes. As a teacher, I’m always on the lookout for new and interesting ways to promote learning in my classes.

Seeking Wisdom » resistor color codes

As a geek, its cool to find ways to do that with technology. I recently found out about an awesome website,, 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. 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).

Graphical Resistance Calculator

Although I have removed other book examples from this web site, this page remains the most popular destination within — presumably as a resource for students of electricity/electronics and my fellow radio geeks. Enjoy! Illustration Copyright 1996 Danny Goodman (AE9F).