27 Feb
2008
27 Feb
'08
2:57 p.m.
On 26 Feb 2008 at 19:57, Tony Duell wrote:
No _new_ components, but you still have to reprogram the microcontroller
(which may involve pulling it from the board..). Personally, I'd rather
change some R's and C's
Argh!. I grew up learning to design solutions to
problems, rather than
throw microcontrollers at them in the hope they'd go away.
Aw, Tony, a little 8 pin PIC or an ATiny can do this with no
additional active packages. The algorithm can be tweaked with no
component changes.
Yes, it might be fun doing it with NE567s or somesuch, but then,
someone even more conservative would castigate you for not using
tuned LC filters and discretes for the active part. A couple of
6SN7s and some powdered-iron core inductors should do the trick...
I have an _old_ modem where the reciver has an input filter consisting of
a metal can with 8 or so tuned pot cores and capacitors in it. The output
of that is mixed with a local oscillator, the 'sum' frreqeuncy is taken
and fed to a discrimiator circuit. All discrete transsitors, of course...
I really like the little microcontrollers--they're cheap and they do
the job. I'm not averse to using them when they're the best
solution.
So do I. The operative part being 'when they're the bast solution'. I
don't feel they are in this case.
-tony