From: Winfield Hill
Subject: Re: how to master electronics, use of transistor, op amp...?
Date: 2 Nov 2002 07:50:24 -0800
Organization: Rowland Institute
X-Newsreader: Direct Read News 4.00
> Winfield Hill wrote ...
>> So, it's very hard for me to comprehend designing viable circuits
>> without any schematic at all, either on paper or in computer file.
> I worked with someone who could do it; TV 'jungle' circuits in the days
> before ICs. He simply had an excellent visual memory, so the circuits
> were visualised inside his head.
I don't question that, I can see fairly complex complete circuits in
my head after I've worked with them for an hour or so, or while I'm
designing it, but what I question is being able to perform the entire
design in your head, at least for more complex circuits such as the
one I posed for Wafer.
I usually wake up early, 4am or so - too soon to get up. Often I
just lie in bed, eyes closed, and think about some new circuit. My
imaginary design doesn't begin to coalesce until I start calculating
part values to test the viability of my idea. After I've done a few
parts and arrive at a complex equation to be derived on the fly, with
exponentials, exponents, etc. all a-buzz, the mental process begins to
break down. I have to go back over a part that's slipped away, and
I'm getting close to the point where I'll get up and sit with some
paper in front of me. For a complex design, this point can arrive
well before getting all the way through.
Now, let's say I'm in prison without access to paper. Ahem. Er, no,
let's say I'm stuck on extended vacation on a tropical beach, without
paper. Hopefully I could develop the capability to progress further
through the design and remember it all. Alternately, if I continually
forgot it, I could get the pleasure of doing the design again and again
without realizing I'd already done it before... :-)