Re:Do-it-Yourself ASICs (2013)
by kevin_thibedeau on Tuesday June 23, 2020 @12:18PM
(#23616012)
The eBay sourced chips are likely counterfeits that won't meet all the specs.
Re:Do-it-Yourself ASICs (2013)
by omgwtfbyobbq on Tuesday June 23, 2020 @01:34PM
(#23617305)
In my experience the random stuff I buy off of whatever $Auction_Site seems identical to what I buy from $Local_Vendor, but with no QA or packaging. The defect/failure rate is higher and it takes a lot more time to arrive, but the cost is significantly less.
It's possible that there are more counterfeits, but I don't think the stuff off of $Auction_Site is likely (>50% chance) to be a counterfeit just because it's from $Auction_Site.
Re:Do-it-Yourself ASICs (2013)
by kevin_thibedeau on Tuesday June 23, 2020 @04:47PM
(#23620034)
If it's a chip that you can search for in a product description it has a high enough profile to be an SZ fake. See this example of a fake signal gen IC that almost works properly:
https://www.youtube.com/watch?v=02XtneCHnDA
Add in a price that's too good to be true and the odds go up.
Re:Do-it-Yourself ASICs (2013)
by omgwtfbyobbq on Tuesday June 23, 2020 @09:27PM
(#23622845)
I can see that. I've purchased several laptop batteries that likely used old cells pulled from another laptop or whatever. At the same time, I don't mind that the runtime is a 1/2 to 3/4 of a new battery when the price is 1/5 of a new battery.
I was just about to order it when I realised it might be cheaper on eBay. There a found an assembled board with the same amplifier for 56p with a minimum order of 5 pieces:- £2.80 post paid and ready to use - and four spare ready-made amps for future projects.
Beating the system is fun, too.