Biggest electronics mistake you ever made?

Not sure if this is the right kind of question, but I'm feeling bad, because after painstakingly assembling 8 surface mount boards with about £5 worth of components on each board and carefully gluing them in place (they're Hall effect detectors for a model train turntable) I used a 25-pin d-sub connector to connect them to power and logic inputs.

I forgot that d-sub pin numbering doesn't map directly on to ribbon cable, so fried at least half of them by ramming 5 volts into an output.

Obviously, letting the magic smoke out is not uncommon, but I don't think I've ever done this much damage this efficiently before... Share your stories for mutual schadenfreude!

Edit: Well it looks like the pros have put a lot more money up in smoke than me... In other news, having had a night's sleep and a day at (non-electrtonic) work, I've returned to discover that one of these boards failed as a dead short and protected the rest from dying. Lesson learned, I think.


  • pmunagapmunaga Forum Coordinator

    Hi @rohit21,

    This kind of mistakes sometimes do happen and help us improve. During my project work, I have burned my demo project while connecting all the components on the bread board. I had to remove the micro controller and while reinserting it back on to breadboard, I had placed it wrongly resulting in the damage to the micro controller. There was no smoke and that is why all the other components connected to the micro controller were also damaged as they were connected to it for a long time. Lesson to be learnt here is, whenever such case arises replace all the components and start fresh or else check the condition of the components used earlier before using them in later experiments.

    Best Regards,

Sign In or Register to comment.