Yesterday, I wrote about my foibles in ignoring my own advice. As SiliconFarmer pointed out over on Twitter, it’s not just something you need to do when you’re re-purposing a close land pattern. Sometimes even the “correct” pattern can have the wrong drill size or a few mixed up pins.
The bottom line is that if you want to reduce the chance of scrapping some expensive PCBs, or having spots that look like what I did (above), check your land patterns.
I couldn’t find my wire-wrap wire late last night, so instead, I used the leads from old though-hole resistors. It’s kind of a mess, but I do like the hatch-markish look that I gave it.
Not to shift any blame frommyself, but I do find it quite annoying when a part falls into such a common standard configuration, as in three-terminal regulator, but the manufacturer picks a different pin-out.
(Note that I did this rework myself at home. The folks here at Screaming Circuits do much, much higher quality work.)
Duane Benson
The problem with unwritten rules is that they’re unwritten