this post was submitted on 29 Jul 2024
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I did something like this once. I swapped the "power" and "status" LED silkscreen labels on 100 PCBs on a custom device. The design rules checker in my software doesn't catch labeling errors.
If you think your design is finally done.... it's not. Check it again. Go to bed, and check again in the morning. And check again in the evening.
When I was a kid my dad had a computer. A 486. It didnt have a CMOS battery. He went to the computer fair to talk to the guy he bought it from and he got another copy of the manual.
Manual said to use some weird 3.7V lipo pack across header J1 or something like that.
He did that.
And it turned out that was the wrong manual.
The battery exploded. Like, loud as hell. 3.5" drive bay covers shot clear across the room and put a mark in the closet door that's still there to this day.
How did you fix that? Swap the LEDs in software?
Since it's a PCB, unlikely. It's likely hardwired In the circuit. You'd need to physically change the printed label in that case
No. Swap the labels and make the PCB again.
Not particularly harmful, but so embarrassing. I think many of us have made similar mistakes. Thanks for the laugh.