[sdiy] Metric vs imperial, was: My new Moog 960 sequencer clone module project.. slowly but surely ..

[Richie Burnett]

> And hell, aren't nearly all electrical component pin spacings in standard?

If you do a lot of PCB design work, you get very quick at converting 
backwards and forwards between millimetres and thousands of an inch (US 
mils.)  Or at least how to get the CAD package to do it for you most of the 
time.

The thing that I don't understand is why connectors are available in metric 
and imperial options that are so close:  e.g. 0.1" vs 2.5mm,  or  0.2" vs 
5mm.  That's less than 2% difference.  These are close enough as to be 
almost the same in terms of space utilisation, but just far enough out that 
there's enough runout by the end of a multi-way connector that the wrong 
part won't fit! (>.<)

-Richie, 


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