[Interest] [OT] Re: thanks for extra reading suggestions - sorry to insult technical writers

[Atlant Schmidt]

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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