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Subject: Re: how to master electronics, use of transistor, op amp...?
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Date: Sun, 03 Nov 2002 11:46:39 GMT
NNTP-Posting-Date: Sun, 03 Nov 2002 06:46:39 EST
Organization: Road Runner
Kevin Aylward wrote:
> "Wafer" wrote in message
>>Joseph Legris wrote:
>>>> You see, I simply skip most of the calculations and just put
>>>>together something that would probably have at least fair
>>>>then tweak the thing as needed.
>>>That's fine if you have the time.
>>>But what if you need to design a circuit before a deadline, for a
>>>certain cost, operating under a variety of environmental conditions,
>>>assembly in a factory by people who don't know how it works (yet who
>>>still must test it), using parts whose characteristics vary randomly
>>>initially and later with age and temperature, satisfying the
>>>agencies for safety and EMC compliance, while integrating with
>>>devices and remaining serviceable in the field for a certain period
>>>without running down the batteries.
>>>Oh yeah, it has to fit in the housing too.
>>>That's some tweaking.
>> Oh boy, here we go again. I know you are not going to like this,
>>I feel a response is appropriate, even necessary. I actually consider
>>all that stuff while designing things. In the example I gave of the
>>device with 400+ parts, it costs less than 10% of the nearest
>>competitor's product, does more, requires no calibration, accepts a
>>tolerance for the parts, never looses its settings even if left
>>unplugged, does not require battery backup, complies with all
>>regulations, is easier to set up and use, and does not require the
>>special external equipment that competing products do. Did I mention
>>is less than half the size, and draws less power? It also uses all
>>standard off-the-shelf parts.
> And you done this all in your head? imo, one of you basic claims is
> untrue. Either you done more detaild design then you claim, or your
> product was not as good as claimed, excepting the case where the
> competitors product was designed by a monkey.
> Kevin Aylward
> SuperSpice, a very affordable Mixed-Mode
> Windows Simulator with Schematic Capture,
> Waveform Display, FFT's and Filter Design.
You are forgetting that as I go along, the circuit is taking shape
on the breadboard. The entire design with all it's intricacies does not
have to be in "cache memory" all at once at any given time. You are not
thinking this through much. The argument is worn out. With certain
people, there will be no satisfying them, and I have better things to do
than this endless, meaningless thread. I contributed to the original
posting, which is all that I intended. To do otherwise is a waste of