We've all done that sort of stuff!
replyMine was assuming that the stripe on tantalum SMD capacitors was the negative side. First prototype board came back from the fab and pick and place department (we had it in house). Immediately caught fire when I powered it up :)
Second lesson, start with current limit on your bench supply, not throw 10A into it :)
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replyI've been an EE for a decade and I made this exact mistake last week. It's inevitable lol
replyYou can catch it with a footprint review. List all your new footprints or old footprints assigned to new parts, and have someone else check them against the datasheets. Or if you ever have the good fortune to work with a very good layout designer, they will check things like that for you just to catch you out.
replyI've seen such things pass through multiple layers of review. It's the kind of thing everyone knows to look for but takes a lot of effort to catch.
replyI haven't managed to design a pcb without finding an issue in the first run.
replyShoutout to OSHpark's prototype service. Something like 5 bucks an inch and you only have to toss out 3 if you find a fault.
Write a list of everything that you fuck up every time, check the next one against it and eventually you get a good one first hit. I had three in a row that worked out of the box in the end!
replyPrinting the board outline and layers combined as well. And checking you used the correct footprints against actual parts helps.