General > General Technical Chat
i won't buy chinise parts from aliexpress or ebay
SilverSolder:
--- Quote from: wraper on September 02, 2020, 02:22:54 pm ---
--- Quote from: SilverSolder on August 31, 2020, 03:40:01 pm ---
--- Quote from: wraper on August 31, 2020, 01:08:42 pm ---
--- Quote from: SilverSolder on August 31, 2020, 12:31:02 pm ---
My philosophy is: if a part works well enough for my purposes, it is genuine enough! :D
--- End quote ---
Until it bites you in ass and causes monetary loses exceeding component price 1000+ fold.
--- End quote ---
In which case - it would not work well enough for my purposes! :D
There is a difference between taking calculated risks and being reckless.
--- End quote ---
Saying if it works for you = genuine enough is already reckless to begin with. Nowhere near to calculated risks.
--- End quote ---
I'm curious why you would think that is reckless, without knowing what I think "works for me" actually means.
Let's take an extreme example: what if I am using a transformer as a door stop in my office, just because I think it looks cool. Would you consider it reckless to use a reconditioned, reclaimed transformer of unknown origin for that purpose?
wraper:
--- Quote from: SilverSolder on September 02, 2020, 05:02:54 pm ---Let's take an extreme example: what if I am using a transformer as a door stop in my office, just because I think it looks cool. Would you consider it reckless to use a reconditioned, reclaimed transformer of unknown origin for that purpose?
--- End quote ---
Reckless is when you use 5 tonne crane to hold 10 tonne weight. It might work for a while before some tragic accident happens. Which often happens with counterfeit transistors, diodes, voltage regulators, capacitors. When internals are significantly weaker in some aspect (voltage, current...) than marking suggests. Not to say that cheaper genuine parts from Chinese brands provide way more predictable results than more expensive parts with unknown internals.
Bassman59:
--- Quote from: dietert1 on August 31, 2020, 05:29:01 am ---Why somebody needs to buy parts really cheap? Probably because there is a lack of income. Maybe the reason for the lack of income is using unqualified parts in the past and spending to much time on fixes.
--- End quote ---
There is an observation here: "It's very expensive to be poor." This manifests in many ways, some of which might be non-obvious.
For example, if you're poor, you might not be able to go see the doctor for something easily treated. Or, even if you do, because you're poor (and in the US the poor generally don't have health insurance), the doctor might write a prescription that won't get filled because the medicine costs $100 and you have to choose between meals or the medicine. And as a result, without treatment, the condition becomes grave, and you end up in the emergency room. Now the $100 medicine and the $100 doctor's office visit look cheap compared to a $50,000 hospital bill.
Another example. You're poor, and you have a low-paying job (but you have a job) and you need a car to get to work. But you can afford only a junker car, which is unreliable, as opposed to a new car. And some days the junk car won't start so you miss a day of work. And if you miss enough days, you're fired.
I could continue but you see the point.
Now in this situation of being the poor college student who can only afford parts from Ali Express instead of DigiKey or Mouser, it's the same thing. You buy the Ali parts and hope that you chose a good vendor who won't fuck you and maybe you'll be able to build your project without spending endless hours trying to figure out why it fails. Or you could spend more and buy the parts from DK/Mouser and know they'll work and you can spend your time debugging your design rather than finding bad parts.
SilverSolder:
--- Quote from: wraper on September 02, 2020, 05:54:03 pm ---
--- Quote from: SilverSolder on September 02, 2020, 05:02:54 pm ---Let's take an extreme example: what if I am using a transformer as a door stop in my office, just because I think it looks cool. Would you consider it reckless to use a reconditioned, reclaimed transformer of unknown origin for that purpose?
--- End quote ---
Reckless is when you use 5 tonne crane to hold 10 tonne weight. It might work for a while before some tragic accident happens. Which often happens with counterfeit transistors, diodes, voltage regulators, capacitors. When internals are significantly weaker in some aspect (voltage, current...) than marking suggests. Not to say that cheaper genuine parts from Chinese brands provide way more predictable results than more expensive parts with unknown internals.
--- End quote ---
Agree 100%. But using a cheap transistor in a non-critical hobby circuit in your basement... hardly reckless, and possibly a learning opportunity? :D
Quarlo Klobrigney:
Unless the experimental device it's in, fails in such a way that tears a hole in the fabric of space-time.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version