It's not 'industry'. It's the international standards agency, whatever it's called. The folks that define a meter as some number of wavelengths of light in vacuo and so on.
There are some early perf boards that have holes on 1/16" centers, for use w/flea clips'. -John =============== > OK, I see in the wiki that 0.1" is by definition 2.54mm. I was taught it > was 2.54001, but that's not right, either. But, if industry says that > they're defined as the same, then I'm the one out of date. =) I wonder > what was with that old prototype board. I can't find it, so it must be in > a landfill, but it was just exactly the wrong size to fit a chip. You > could get the first few pins in, but then the differences would be enough > that no more would fit. > > Bob > > > > > ----- Original Message ----- >> From: Orin Eman <orin.e...@gmail.com> >> To: Discussion of precise time and frequency measurement >> <time-nuts@febo.com> >> Cc: >> Sent: Monday, June 24, 2013 11:35 PM >> Subject: Re: [time-nuts] OT Prototype Boards >> >> 0.1" is 2.54mm by definition these days. >> >> See: http://en.wikipedia.org/wiki/International_yard_and_pound >> >> Now whether the board really is 2.54mm is an entirely different >> matter... >> if it is, you should be fine with 0.1" pitch chips. >> >> Orin. >> >> >> >> On Mon, Jun 24, 2013 at 9:10 PM, Bob Stewart <b...@evoria.net> wrote: >> >>> I need to get some largish prototype boards for my project. Has the >>> industry standardized on a 0.10" pitch for hole spacing? IOW, if the >> ad >>> says 2.54mm pitch will I get a board that will fit American chips, or >>> will >>> I just get something metric sized for the landfill? I ask, because >> I've >>> got a prototype board sitting around here someplace that is unusable >>> because the pitch isn't quite right. Needless to say, I'm ordering >> this >>> from ebay from a seller in China or Hong Kong or someplace, points >>> East. >>> >>> Bob - AE6RV >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.