I would either include the tolerance or imply it with the digits. A 5% resistor would be 10R. A 1% would be 10R0. A 1k 1% would be 1k00 or 1k0%1.
I don't think I use anything with less precision than 1% these days unless it is an unusual part for power or something. 1% are pretty cheap and easy to find.
I don't know that it's such a new system--AFAIK the original motivation was the tendency of decimal points to disappear after blue printing or repeated photocopying. Neither comes up much any more.
I use the 1k2 notation on hand-drawn schematics, and the usual thing is to be governed by significant figures. For instance, a 499 ohm 1% resistor is 499R, but a 510 ohm 5% resistor is 0k51. It doesn't come up much for us since I very rarely use resistors worse than 1%.
On Friday, February 15, 2019 at 12:29:05 PM UTC+11, snipped-for-privacy@gmail.com wrote :
Sadly, it is also the way he thinks. If he could think about what he felt, his opinions might change as evidence built up against them, but if "critic al thinking" was ever taught at Tulane, it would have been in one of the cl asses he skipped. Curiously, he didn't skip the courses on tumbling, which may explain his enthusiasm for intellectual pratfalls.
It's neither stupid nor amateur. Hey, I do lots of power stuff. So I'm not ready to abandon the E24 5% system, in exchange for E48, E96 or E192, 1% systems.
BTW, when I need to select 1% part values, I use the handy resistor_values page on Syd Levine's logwell site,
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Yes, he died 9 years ago, but with his supporting friends, many of us keep him going by often using his web-tools.
Stupidity has a lot to do with the continued existence of Imperial. Only in "the land of the free" would transition to a new standard have been optional, rather than mandated along a transition timeline. So you're all free to screw things up still :).
It's that 'free' thing you're torqued about, just like all those other People Who Know Best that have been plaguing the planet since the time of Nero Caesar if not much earlier. Sooorryy.
On Thursday, February 14, 2019 at 10:30:38 PM UTC-5, snipped-for-privacy@gmail.com wrot e:
ople Who Know Best that have been plaguing the planet since the time of Ner o Caesar if not much earlier. Sooorryy.
Actually, we don't have an Imperial standard. We just use it out of inerti a. Metric is the US standard I'm pretty sure. It is the US that suffers f rom having two systems in common use. We have two sets of wrenches to work on cars because we don't build cars as well as the rest of the world and i mport either cars or all the parts for the foreign cars built here. We imp ort nearly all electronic components so that while some dimensions are base d in imperial units of inches, they are always expressed in metric.
I remember working with the government some time back and to buy anything w e had to fill out a form explaining why we weren't buying it in metric. I filled one out saying the thing I was buying *was* metric and the guy who c ollected the forms didn't believe me! lol
Yes, we need to build a whole lot of walls to keep out not just people, but all the ideas.
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