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From: "Spehro Pefhany"
Subject: Re: 5.00 or 5.08 mm terminal blocks?
References: <3DC0EB48.FA5A34D4@scazon.com> <firstname.lastname@example.org>
User-Agent: tin/pre-1.4-19990216 ("Styrofoam") (UNIX) (Linux/2.2.14 (i586))
Date: Thu, 31 Oct 2002 12:02:34 GMT
NNTP-Posting-Date: Thu, 31 Oct 2002 07:02:34 EST
The renowned Gibbo wrote:
> I still prefer inches for PCB work but for everything else almost the entire
> world is metric with the exception of the USA.
The board designs I do are mixed, and in primary inch units (because of
the libraries). There's always hard-metric parts on there too, it doesn't
bother me particularly one way or the other. If it takes X hours to make
up a set of footprints for these connectors, it will be about the same if
they are metric or not- just more digits (from a spreadsheet, to a
"spreadsheet") and more checking.
> This niggles my mind. I use imperial but I know I really should be moving to
> metric as the rest of the world is doing.
The change is slow... but if you do a SMT-only board right now it could
well be metric only. You can still take hard-metric 0603 resistors,
transistors and TSSOP packages and lay them out on a 2 x 3" board with
inch rules for layout. Every PCB manufacturer I've run into from Shanghai
to Scarborough uses square inches for pricing, except for some consumer
paper-phenolic boards (big quantity) where they used m^2!
> I imagine waking up one day to find no more imperial components.
It won't happen overnight. ;-)
"it's the network..." "The Journey is the reward"
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