[Interest] [OT] Re: thanks for extra reading suggestions - sorry to insult technical writers
Atlant Schmidt
aschmidt at dekaresearch.com
Mon Apr 16 15:19:34 CEST 2012
Oliver:
(I realize you're mostly joking.)
> > Haven't you heard of all the analog electronics where
> > there's no concept of boolean logic?
>
> You push the button... there's light. You push it again...
> it goes off. Sounds logic to me...
Sure, *THAT* is easy. Now take a signal at 2,630,000 KHz
and sort it out to a selectivity of 40 or 50 dB from similar
signals at 2,629,800 KHz and 2,630,200 KHz; *THAT* ain't
"logic", it's practically magic!
Or in a NAND Flash Memory (just "logic", right?) allow
about 30-40 electrons to distinguish between a "1" and a
"0". Or even better, between a "0", a "1", a "2", and
a "3". And do it over the full operating temperature
and voltage range for ten years continuously.
http://www.betasights.net/wordpress/?p=1238
Never casually minimize the work of a professional in
another discipline!
> Even taking out the batteries of my motorbike is scary
> enough ("Do I unplug the - cable first, or was it the + one?
> Ah never mind, I disconnect them both at the /same/ time...").
Always take off the grounded/earthed cable first
(so for most modern systems, the negative cable).
That way, if your wrench/spanner accidentally bumps
the frame while you're first loosening the cable
clamp's bolt, nothing exciting happens: you've
just shorted ground/earth to ground/earth.
But if you try to take off the positive cable
first and your wrench/spanner bridges "hot" to
ground/earth, *MUCH MORE EXCITING THINGS* happen.
If you've already opened the circuit by removing
the negative cable, there's no possibility of
excitement even if your wrench/spanner slips.
Atlant
-----Original Message-----
From: interest-bounces+aschmidt=dekaresearch.com at qt-project.org [mailto:interest-bounces+aschmidt=dekaresearch.com at qt-project.org] On Behalf Of Till Oliver Knoll
Sent: Saturday, April 14, 2012 11:56
To: Qt Interest
Subject: [Interest] [OT] Re: thanks for extra reading suggestions - sorry to insult technical writers
Am 14.04.2012 um 02:11 schrieb Syam Krishnan <syamcr at gmail.com>:
> Haven't you heard of all the analog electronics where
> there's no concept of boolean logic?
You push the button... there's light. You push it again... it goes off. Sounds logic to me...
> An electronics engineer, for instance, has to worry if he'll have
> sufficient
> voltage when he connects one part of the circuit to another; whether the
> first circuit will be able to drive the next stage.
Well, that's very easy to solve: you just make hamster Huey run faster in his wheel!
That tip was for free ;)
> We on the other hand
> can put almost infinite number of nested 'if's or loops without ever
> worrying if the outer loop will be able to drive the inner one...."
Infinite loops - See the complexity in THAT? ;)
> ... is just based on lack of knowledge/experience on
> electronics.
Indeed: I don't touch anything which goes beyond 12 V (aka "killer voltage").
Even taking out the batteries of my motorbike is scarry enough ("Do I unplug the - cable first, or was it the + one? Ah never mind, I disconnect them both at the /same/ time...").
By the way, is it true that electrical engineers put their fingers into the power outlet each morning instead of drinking coffee, like we software engineers do (the entire day)?
:)
Cheers, Oliver
P.S. Yes, off course you are right with your objection ;)
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