High precision voltage reference, but you need to calibrate it first using the potentiometers on the prototype board.
For 56 bucks delivered on my doorstep, I can make it myself and maybe even make something better.
You can't blame the guy for trying though. Unfortunately for him he came here to meet his doom.
It's a Buy/Sell/Wanted forum- not the place to shit on the item!
After some thought, I think OP handled it well including naming the turd slinger.
It takes just one person to ruin a thread, a venture etc. It's a tough crowd here.
Exactly! His entrepreneurial spirit is applauded, his attitude is shunned.
If he had come here asking humbly “guys, I am a beginner who would like to build and sell these devices on Ebay, what do you think? How can I improve these while keeping a low cost?” He would likely have received plenty of useful advice. But his stubbornness to defend the indefensible, that is why he aggravated everyone.
I wonder whether ebay seller sqwarrel will continue to sell the devices https://www.ebay.com/usr/sqwarrel
The listings he linked in this thread have been ended on Tue, April 23, but not those in the link you just provided. Well, I don't really care. A pity, but this guy obviously needs professional help. Not speaking about EE.
...
His entrepreneurial spirit is applauded, his attitude is shunned.
If he had come here asking humbly “guys, I am a beginner who would like to build and sell these devices on Ebay, what do you think? How can I improve these while keeping a low cost?” He would likely have received plenty of useful advice. But his stubbornness to defend the indefensible, that is why he aggravated everyone.
Frankly there is nothing wrong with potentiometers IF they are high quality and adjust within a tiny range
The crime is the unrealistic claims?
The crime is the unrealistic claims? We have an entire nation built on that, we love and support. 5-star reviews galore lol. "Nijikang Ruby electrolytic capacitor" oh sure 0.1% 25ppm. It must be the ocean that protects them from flying objects, compared to here.
I think posting a link to an ebay listing for a good inexpensive reference would be very welcome and beneficial for the community and nobody would oppose that, even if it had sales promotion as a result (and/or intent, who cares!), provided that the specs were decent, true to the claims, and the manufacturer was ready to listen and cooperate. There are good examples of such cases: recent ones that come to mind are the ST42 LCR tweezers and that interesting ET sampling scope, forgot the name, that Joe Smith was (is?) an early tester of.
The real issue was the attitude. Good advices were ignored, good questions were dismissed, valid criticism was confronted with aggression. That sucks. You don't behave like that on a respectable forum, especially one where nobody owes you anything.
I think posting a link to an ebay listing for a good inexpensive reference would be very welcome and beneficial for the community and nobody would oppose that, even if it had sales promotion as a result (and/or intent, who cares!), provided that the specs were decent, true to the claims, and the manufacturer was ready to listen and cooperate. There are good examples of such cases: recent ones that come to mind are the ST42 LCR tweezers and that interesting ET sampling scope, forgot the name, that Joe Smith was (is?) an early tester of.
The real issue was the attitude. Good advices were ignored, good questions were dismissed, valid criticism was confronted with aggression. That sucks. You don't behave like that on a respectable forum, especially one where nobody owes you anything.
Agreed
he's pissing off the very same people that would have been interested in his device
Quotehe's pissing off the very same people that would have been interested in his device
I really don't think so. The sort of people on here know how to make these simple things if they need one, but if they're that way inclined they will buy a cheaper and better looking one from AliBayzon. I mean, he showed that it's just some cheap parts on a perf board - anyone could do it.
What the people on here would be interested in is showing how superior they are by finding the tiniest fault, and loudly noting that you couldn't set a 20-digit meter from one so it must be shit. It's that community attitude that led to his attitude.
He seemed impervious to taking advice, but that's not an indictable offence. Often, one will get contradictory advice so if you follow one you'll be pissing off the supplier of the other, but why should he take any at all? In the end he has considered it all and decided that the way he will go is the way to go, and that should perfectly OK. It would be OK, except to those that think their advice is gold plated and simply must be followed.
In that thread it might be kind of OK to try and make him look a fool by asking about stuff that only applies to high-end super-expensive traceability (although using that as as a weapon surely sucks), but here in buy & sell it's just designed to stiff his sale. If you're actually interested in buying his kit then that sort of question is sensible, but the only ones asking here were those with a grudge intent on screwing any potential sale. I don't think that's on - if someone is happy to buy shit, it should be between them and the vendor.
Maybe he can put the assembly in snake oil, to stabilize the temperature and get rid of humidity influences.
I really don't think so. The sort of people on here know how to make these simple things if they need one, but if they're that way inclined they will buy a cheaper and better looking one from AliBayzon. I mean, he showed that it's just some cheap parts on a perf board - anyone could do it.
What the people on here would be interested in is showing how superior they are by finding the tiniest fault, and loudly noting that you couldn't set a 20-digit meter from one so it must be shit. It's that community attitude that led to his attitude.
He seemed impervious to taking advice, but that's not an indictable offence. Often, one will get contradictory advice so if you follow one you'll be pissing off the supplier of the other, but why should he take any at all? In the end he has considered it all and decided that the way he will go is the way to go, and that should perfectly OK. It would be OK, except to those that think their advice is gold plated and simply must be followed.
In that thread it might be kind of OK to try and make him look a fool by asking about stuff that only applies to high-end super-expensive traceability (although using that as as a weapon surely sucks), but here in buy & sell it's just designed to stiff his sale. If you're actually interested in buying his kit then that sort of question is sensible, but the only ones asking here were those with a grudge intent on screwing any potential sale. I don't think that's on - if someone is happy to buy shit, it should be between them and the vendor.
As I see it, the OP had these references listed on ebay so if they didn't live up to expectations or meet specifications then purchasers had an avenue for reimbursement and negative feedback.