| Electronics > Projects, Designs, and Technical Stuff |
| Never draw a power PCB like this |
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| China NewBoy:
Result: Boom ,The strip blow up, and i made a black mark on the floor,the air switch of the outlet was pop ,half of the PCB turn to black . fortunatly, i didnt hurt myself. what cause it: the L and N on my PCB are too close, and when the power line being pulled and drag back incidentally,the wire loose,and a piece of wire cross through the L N . i really learn a lesson from it. (the floor and PCB have been cleaned,the mark still is on the floor) |
| capt bullshot:
Nothing wrong with that, everyone (in electronics) has to make this kind of experience at least once in his life / career |
| Miti:
It gives you that feeling of awareness and respect for electricity that you didn’t have before. :-DD |
| AndyC_772:
I've seen marks very like that on the inside of a metal chassis, underneath the PSU. The PSU had live wires soldered through holes, which hadn't been properly cropped close to the PCB surface, so it only took a mild knock (or possibly a modest voltage spike) to create an arc from PSU to chassis. Top tip, it may be worth making PCB stand-offs a little longer than you think is strictly needed, and/or putting an insulator under the PSU. |
| China NewBoy:
--- Quote from: AndyC_772 on November 05, 2019, 03:14:41 pm ---I've seen marks very like that on the inside of a metal chassis, underneath the PSU. The PSU had live wires soldered through holes, which hadn't been properly cropped close to the PCB surface, so it only took a mild knock (or possibly a modest voltage spike) to create an arc from PSU to chassis. Top tip, it may be worth making PCB stand-offs a little longer than you think is strictly needed, and/or putting an insulator under the PSU. --- End quote --- ;) thanks for your tip ;) |
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