[time-nuts] OT Prototype Boards

[Bob Stewart]

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  But, if industry says that they're defined as the same, then I'm the one out of date.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.eman at gmail.com>
> To: Discussion of precise time and frequency measurement <time-nuts at 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 <bob at 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
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