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| station240:
--- Quote from: Wilksey on October 04, 2021, 10:55:44 pm ---The trouble is you can get so much crap from China for pittance that people do not see the value in anything anymore, and when it breaks it's just said "yeah, well it was a cheap one from China". I liken it to NTSC - Never the same colo(u)r, or never twice the same color, but from China it is "Never twice the same component", whilst "batches" can have different tolerances, they usually contain the same circuit unlike some experiences from China. --- End quote --- I ordered 5x of a particular module that outputs 5V via USB, 2x output 4.95V, 3x output 5.3V (outside of USB spec). Measured the circuit, 3x have a higher voltage zener. So I ordered a roll of replacement zener diodes from RS, so I can fix the modules later when I need them, yup they screwed up too, wrong value again. |
| Wilksey:
--- Quote from: james_s on October 05, 2021, 01:23:43 am ---I've built things as gifts for friends and family but I've never tried selling it to them. I have had a handful of random people contact me about my DS1742 adapter board and nobody has balked at the price, although I really don't want to be in the business of assembling widgets. --- End quote --- No, I haven't actively tried selling my stuff, I usually make things like LED Christmas ornaments, which I just give away to family and friends, I usually just say if they want to give anything for it then to donate to charity but it is not mandated and it is not a set amount. I don't know about others but SOME of my F+F almost insist on trying to give me something for the gift, which is when I just tell them to donate to charity if they feel the need. To be honest the only thing that has "gone wrong" with my gifts so far is the batteries have run out, some think that the batteries will last for an eternity because the ones in their TV remote do. :palm: |
| Wilksey:
--- Quote from: station240 on October 05, 2021, 05:56:36 am --- --- Quote from: Wilksey on October 04, 2021, 10:55:44 pm ---The trouble is you can get so much crap from China for pittance that people do not see the value in anything anymore, and when it breaks it's just said "yeah, well it was a cheap one from China". I liken it to NTSC - Never the same colo(u)r, or never twice the same color, but from China it is "Never twice the same component", whilst "batches" can have different tolerances, they usually contain the same circuit unlike some experiences from China. --- End quote --- I ordered 5x of a particular module that outputs 5V via USB, 2x output 4.95V, 3x output 5.3V (outside of USB spec). Measured the circuit, 3x have a higher voltage zener. So I ordered a roll of replacement zener diodes from RS, so I can fix the modules later when I need them, yup they screwed up too, wrong value again. --- End quote --- Oh don't get me wrong I order Chinese stuff but I like to think that I have enough knowledge to test the way you have tested them, and fix and find the failure point, most people who are no EE's who buy this stuff just buys it and whacks it in. We're talking a £5 12V - 5VUSB car adaptor with questionable regulation for a £1000 phone in some cases, and I dare say in most cases the phone will be fine, but still. There are some really good and cheap Chinese components and kits out there and if they do not use the original IC then they are a bloody good clone. |
| wraper:
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| Wilksey:
--- Quote from: wraper on October 05, 2021, 09:05:41 am --- --- End quote --- So true! |
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