R. Stern writes -
"I work in a computer lab with a physical computing studio, and recently I cleaned out the component closet. It occurred to me that the reason we had a build up of unlabled resistors was because noone knew how to read them without the Resistulator widget or a resistance calculator website, so I made a sign to tack into the cabinet itself for offline calculation. You can download the PDF for your own use. " - Link.
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Posted by Phillip Torrone |
Jan 26, 2007 07:01 AM
DIY Projects, Electronics |
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I hope I don't get in trouble for this but as I am a R&D electronic tech and having got my education from Uncle Sugar here is a little ditty that might help,
Bad Boys Raped Our Young Girls But Violet Gave Willingly, Get Some Now
As you can tell with a little thought that is the resister color code including the tolerence bands. If I get enough positive feedback I'll make a pretty picture of it and post it for ya
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There is a typo in the example.
It should be:
Resistor value = 20 x 1000 = 20K ohms
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This is what I did - I labeled each resistor bin/drawer with the color code. I have done this for several places that I've consulted.
This is an example: USBmicro resistor labels from USBmicro
The small drawer labels are available from that site as color pdf files.
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I'm new to this but his little chart on the pdf says brown is 1 and not 0. Wouldn't that make his example on the pdf, red brown, be 21 and not 20?
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Hey all, thanks for checking my work. I fixed both typos, and updated the files on my site. D'oh!
-R. Stern
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"Unlabelled resistors"? You mean somebody scraped the stripes off?
With a little bit of practice, you don't need to interpret the resistor color code. You just look at it and say "Oh, that's a 6.8K resistor". In fact, I couldn't tell you what the colors for that would be, but I know one when I see one.
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RannFox - you won't get in trouble and i'm not going to delete your comment - but here's something to think about... all these new people learning electronics could learn something better than this offensive mnemonic - i realize it's still said and taught all the time, but we don't need to continue this. if you look at the history of this mnemonic it's been pretty awful.
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Rannfox, I learned that one from an old Navy electronics guy. And I stll use it today. I did hear one that did not involve sex, but who can remember something like that?
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again - why don't we use this opportunity to kill a bad mnemonic.
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In the multiplier column, black's value should be 1 and not zero. I think it also makes it a bit clearer if you were to label the multipliers via factors of 10.
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