[time-nuts] OT stuffing boards: was GPS interface/prototyping board

David davidwhess at gmail.com
Fri Jun 24 16:21:43 EDT 2016


On Fri, 24 Jun 2016 20:01:24 +0100, you wrote:

>...
>
>I definitely concur with the 'make it SMT as much as possible' plan -
>pin-mount stuff is a pain. Also, QFN is far preferable to QFP, as
>catalogue suppliers don't always manage to ship fine-pitch stuff
>without bending legs in one direction or another. Reworking a duff QFP
>(or fine-pitch SOP) can take as long as assembling a whole board. With
>small volumes, there's no real statistical process control, you just
>do what you think will work, fix any defects, and update the big
>logbook of results.
>
>...

I keep wishing J-lead PLCCs were still available.  With them you had
the options of direct soldering their 0.050" lead spacing or using a
sockets with a pin spacing of 0.100".


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