> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Marc Nicholas
> Sent: Saturday, June 14, 2003 10:31 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE] Bypass Capacitors
>
>
> You're looking at proportional economics and not absolutes.
> For example, a PIC project that cost $8 to build 5 years ago
> now costs $2 and is functionally superior, while average
> income has still risen.
>
> So, just because an MCU that cost $8 5 years ago now costs
> ~$2 doesn't mean that the cost of decoupling has
> *risen*...it's still dropped significantly. It hasn't dropped
> inline with the cost of MCUs, for sure...but that's a
> somewhat meaningless and arbitrary metric, don't you think?
> Kind of like me saying that compared to the cost of oranges,
> capacitors are still expensive.
>
> AND...if you're paying US$0.15 for .1uF caps...let me know
> and I'll source you cheaper ones. Even my local electronics
> retail store sells single units cheaper than that OTC!
>
> -marc
>
>
>
> On 15/6/03 00:58, "William Chops Westfield" <billw@CISCO.COM> wrote:
>
> >   The cost of adding decoupling caps to a design is
> negligible...you can't
> >   argue you did it for cost reasons anymore.
> >
> > Ok, how do you figure that?  Silicon has gotten much cheaper ($1
> > microcontrollers), but the price of 0.1uF decoupling caps
> is still up
> > at close to $0.1 each, at least in hobbyists quantities
> from hobbyist
> > dealers. To me, that means the cost of decoupling caps has
> become MORE
> > significant.
> >
> > Of course, some of this seems to be "marketing."  Good
> deals on 0.1uF
> > caps are hard to find BECAUSE there is a high demand for
> them, BECAUSE
> > that's what all the published hobbyist projects use for
> decoupling.
> > Pick an oddball value like .039uF or .047uF, and it will probably
> > still work fine for most bypass applications, and you're
> more likely
> > to find a good deal.
> > (Jameco: .047 disk: $0.07, .1 disk: $0.15.  Of course, also
> .1 mono $0.07,
> > so it's not as bad as it could be.)
> >
> > BillW
> >
> > --
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> >
>
>
> --------------------------------------------------
> Marc Nicholas Geekythings Inc. C/416.543.4896
> UNIX, Database, Security and Networking Consulting
>
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