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<whitequark>
wow
<whitequark>
I added a probe to my CNC mill and it leaks steps like the russian pump leaks water
<whitequark>
something needs to be done with this, it's terrible. .1mm of displacement over 10mm Z move is typical
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* dos1
doesn't know how much is 7 by 8 without counting on fingers
<dos1>
but when it takes me about 2-3 seconds, then I can't bother ;)
<whitequark>
well
<whitequark>
I can add and multiply 3-digit numbers in my head, it's convenient when, say, you have a drawing with relative offsets and you need to go to absolute
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<whitequark>
or when you need to know how much, if approximately, something in bulk will cost
<whitequark>
a skill I use daily. so I say, fuck calculators, too much hassle
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<dos1>
adding and substracting large numbers in head is easy; multiplication is a bit harder; for some factors like 7*8 I need some quick help with fingers, but once result is already in short term memory it's no big deal; but with both factors being 3-digit I'd have problem to do it entirely in head
<dos1>
but if only there's some piece of paper available (like on exam), there's absolutely no need for calculator...
<whitequark>
yeh paper too
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<DocScrutinizer05>
>>I'm using an Intel P4 2.6GHz, and initially the CPU jitter was greater than 90ms (not good). I needed to disable the Intel SMI, and make a few tweaks in the BIOS, and now my CPU jitter is 12ms. << BWAHAHAHAHA
<DocScrutinizer05>
7*7 is a nasty one you need to know
<DocScrutinizer05>
whitequark: nice one about abysmal chinese EE done for your CNC
* DocScrutinizer05
ponders getting a scope finally
<DocScrutinizer05>
for sure I'll want one with complete control/data over USB as an option
<DocScrutinizer05>
plus I'd instantly plumb together a 8 channel mux based on reed relays for that
<DocScrutinizer05>
dunno if contact/A/B reed swaitches are available in ultra-tiny. Hope so
<DocScrutinizer05>
you don't what to build such mux in a way where in theory two contacts could stay closed concurrently and would short two inputs then
<DocScrutinizer05>
whitequark: remember audio of GTA02?
<DocScrutinizer05>
from schematics I calculated that with nominal 16R headphones, you got a HPF with a -3dB cutoff freq of ~400Hz iirc. That device passed QA (before my time) since "it worked"
<whitequark>
lol
<DocScrutinizer05>
that's how chinese "QA" works
<DocScrutinizer05>
"oh yeah, some noise coming out" -- QA-tester puts checkmark to '[ ]Audio'
<whitequark>
I mean, I can understand a single device
<whitequark>
but the whole design?!
<DocScrutinizer05>
they test with maybe a 800Hz sine wave or whatever, and it sounds beautiful via headphones
<DocScrutinizer05>
even looks good on scope
<DocScrutinizer05>
probably nobody of EE ever really used the device to listen to music
<DocScrutinizer05>
and even when they did, they probably wouldn't have noticed the missing bass
<DocScrutinizer05>
odds however are they tested the audio output for doing voicecalls, and there a HPF with a cutoff of ~400Hz is even _improving_ the legibility of the voice ;-P
<DocScrutinizer05>
to me it seems that chinese EE ofthe simply connect signals of same name together, no matter what
<DocScrutinizer05>
reading datasheets isn't a commonly appreciated discipline
<DocScrutinizer05>
pulsewidth, slewrate, noisefloor, dutycycle? forget about it