4 Jun
2006
4 Jun
'06
3:20 p.m.
From: "Andy Holt" <andyh at
andyh-rayleigh.freeserve.co.uk>
Tony wrote:
---snip---
Hi
Still, Tony has a point. In order to do intellegent trouble shooting, one
has to be able to understand how the analog elements of real circuits
effect how a circuit will function incorrectly. Sure, one can hunt and
swap parts until it works but to know the part you are unsoldering is the
cause requires true understanding of what that part is failing to do
I haev never understood how you can understand
digitial electronics
properly and not understand analogue electronics. I certaimly couldn't
understnad digital stuff until I understood things like transmision
lines, termination, etc.
You can understand it well enough to use for many
practical purposes by
just
knowing a few "rules of thumb"*. A better, but still not necessarily
detailed, understanding of the analogue background can help considerably in
some of the more tricky situations - especially if you are
"stretching"/abusing the "rules". from an analog sense.
Of course, one is
hopelessly lost fixing power supplies without some
analog knowledge. Understanding feedback and how each part effects
the other is the key to fixing these parts. I see so many times that
some fellow will say, I've replaced all the capacitors and it still doesn't
work. They ask for help but I often don't know where to start. Should
I begin with elementary electronics or just use them as a remote VOM and
oscilloscope.
Dwight