Electronics > Beginners
What's the most dangerous failure's these days ?
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Siwastaja:

--- Quote from: Psi on July 26, 2019, 11:02:07 pm ---Main issue I encounter is pcb assemblers using non genuine parts in critical sections.
Even when told that the part must be genuine

--- End quote ---

Supply all critical parts for these Chinese assembly houses.

Another reason I supply the parts by myself is the lead time and availability risk, which often applies to the very same critical, non-replaceable parts. Any part can be suddenly unavailable with 6 months of lead time. If you ask your assembler to source, that 6 months starts when you pay for your order. When you stock the parts yourself, you can order them as soon as your approximate schematic and proof-of-concept prototypes show you are going to use those particular parts.
ddavidebor:

--- Quote from: EEVblog on July 26, 2019, 12:17:57 pm ---Multi layer ceramic caps can be dangerous with a grunty PSU behind it.
I'm surprised they there aren't more issues than there are with things like motherboards with hundreds of them with people flexing the boards during install.
But lithium ion batteries have to take the cake, they are exothermic if the get going, and they energy density of modern batteries is getting seriously high.

--- End quote ---

Well motherboards are very thick and most of the MLCCs are very small (small = strong, counterintuitively)
aandrew:

--- Quote from: garethw on July 26, 2019, 07:12:32 am ---feral apostrophe

--- End quote ---

My new favourite name for them. Brilliant!
Zero999:

--- Quote from: ejeffrey on July 26, 2019, 05:02:35 pm ---Hmm.  I know one person who burned down his garage with lithium ion batteries, but that was some DIY thing, not consumer electronics so it was likely his fault.  I know one guy who had substantial heat damage to his kitchen cabinets and floor when the SSRs in his oven failed short-circuit while he was on vacation, probably due to lighting or other surge.  My brother also had his oven spontaneously fail on but he was home and able to flip the shut off the breaker before it did any damage.
--- End quote ---
That sounds like very bad design. There should be a thermal fuse to cut the power to the element if the switch jammed on.
soldar:

--- Quote from: tggzzz on July 26, 2019, 12:01:36 am --- Speaking from a personal perspective, greengrocer's apostrophies such as "most dangerous failure's" or "consumer PSU's" are very dangerous.
--- End quote ---
People who do that kind of thing should be analyzed.

And while we are at it, another thing I see more and more often is people who drop the final d or ed from verbs. Like writing "That is not what is being ask" instead of "that is not what is being asked". I see it more and more and it really gets to me. Is their brain so lazy or fuzzy they don't know the difference? People who do that should be analyzed.  You know what I mean.
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