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

[Harry]

I had a salesman talk me into using the metric 5mm and English 5.08mm for connections that should not be
swapped, as they "would not mate". 

The hell they wouldn't !

Never mix the 5mm and 5.08mm. Pick one. Then use 2mm, or 1.27mm, or anything else.

H^) harry




----- Original Message -----
From: Richie Burnett <rburnett at richieburnett.co.uk>
To: thresholdpeople <thresholdpeople at protonmail.com>, Tom Ivar Helbekkmo <tih at hamartun.priv.no>
Cc: synth-diy at synth-diy.org
Sent: Wed, 11 Nov 2020 12:32:01 -0500 (EST)
Subject: Re: [sdiy] Metric vs imperial, was: My new Moog 960 sequencer clone module project.. slowly but surely ..

> 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, 


-- 
This email has been checked for viruses by AVG.
https://www.avg.com

_______________________________________________
Synth-diy mailing list
Synth-diy at synth-diy.org
http://synth-diy.org/mailman/listinfo/synth-diy
Selling or trading? Use marketplace at synth-diy.org