[time-nuts] schematics of frequency counter
csteinmetz at yandex.com
Tue Jan 6 13:23:02 EST 2015
>Actually, I dont want to ask my colledge for help. Everytime ,for each
>guy I ask for help, I need expain the entire system and principle of a
>frequency counter to him. They just keep asking questions instead of
> answering mine.
In defense of the hardware guys, there are a lot of questions that
NEED to be asked (and answered) before a design that fulfills your
requirements can even be attempted. I don't mean to be unkind, but
you skipped all of those questions, designed the software, and now
you want someone to hand you a hardware design that solves the
problems you are having. From what I can tell, you still don't even
have a good concept of what the hardware needs to do, much less how
to specify these needs as coherent project requirements -- and even
less how to actually design the circuitry you need. Furthermore,
when someone suggests something that might fix a glaring error in
your design, you say you can't do that because (for example) PNP
transistors are too expensive.
Ask any competent engineering manager and you will learn that good
analog design engineers are the rarest and hardest to find
development team members, and that getting the hardware right is very
often the hardest part of any design (note that I did not say, "most
time-consuming" -- rather, "hardest").
So, now you need the analog hardware for your counter, and you have
the mistaken impression that it shouldn't be any effort at
all. Hopefully, you are now beginning to understand that at least as
much good thinking needs to go into the hardware as into the
software. And hopefully, you have reviewed the analog circuitry of
some good commercial designs to see what sorts of things good analog
designers have done in the past to solve the same problems you are facing.
You said yourself that you don't really know anything about analog
design, and your existing circuit and your comments here on the list
show that to be an honest and true assessment. But you also have
resisted advice you have gotten from experienced analog designers,
and now you say you can't even be bothered to answer the questions of
people who would try to help you!
At this point, I'm afraid that whatever is posted on this thread
isn't really going to help you improve on what you have -- it is just
so much wasted internet bandwidth. You need to learn at least enough
about analog design to ask and answer intelligent questions about
your needs, and you need to be willing to consider the advice you
receive, before any of this can help you.
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