Your DS18B20 temperature sensor is likely a fake, counterfeit, clone
1–10 of 239 posts
Re: Your DS18B20 temperature sensor is likely a fake, counterfeit, clone
#2Anyone have an idea what these are used in? I originally thought they might be used for 3D printing, but that doesn’t seem to be the case - except, perhaps for chamber temperature.
Re: Your DS18B20 temperature sensor is likely a fake, counterfeit, clone
#3Wow, I am pretty sure I had some of these, parasitic power would NOT work, I had it on a scope and everything. What a pain in the butt that was! Why not just give these mostly cloned parts their own honest name and part number?
Re: Your DS18B20 temperature sensor is likely a fake, counterfeit, clone
#4Anyone have an idea what these are used in? I originally thought they might be used for 3D printing, but that doesn’t seem to be the case - except, perhaps for chamber temperature.
I just bought a bunch of cheap indoor/outdoor weather sensors, I'd imagine they might apply.
Re: Your DS18B20 temperature sensor is likely a fake, counterfeit, clone
#5Anyone have an idea what these are used in? I originally thought they might be used for 3D printing, but that doesn’t seem to be the case - except, perhaps for chamber temperature.
For me, I was using them as environmental sensors for an aquaponic setup (water more often when it’s hotter)
Re: Your DS18B20 temperature sensor is likely a fake, counterfeit, clone
#6This affects temperature sensors/parts bought from un-official distributors like ebay or AliExpress, not digikey, farnel, etc. Perhaps I've been too lucky in my career and practiced EE for work, but who would you ever go to ebay instead of digikey??
Digikey certainly has a premium, but their speciality is small numbers/cut tape/etc and they have a small order size which makes them ok for hobby work, and I've used them for small production runs when I didn't want to end up with a ton of excess materials.
Makes you wonder what other junk is out there, and what purchasing guy figured he'd save $10 and get it from ebay...?
Re: Your DS18B20 temperature sensor is likely a fake, counterfeit, clone
#7Anyone have an idea what these are used in? I originally thought they might be used for 3D printing, but that doesn’t seem to be the case - except, perhaps for chamber temperature.
Indoor/outdoor temp sensors. Anything that needs a cheap temp sensor. Really handy since they just steal power from the bus (parasitic) so you don't need to run extra wires for power.
Re: Your DS18B20 temperature sensor is likely a fake, counterfeit, clone
#8Anyone have an idea what these are used in? I originally thought they might be used for 3D printing, but that doesn’t seem to be the case - except, perhaps for chamber temperature.
I have several for homebrewing - monitoring mash, sparge, and fermentation temps.
Re: Your DS18B20 temperature sensor is likely a fake, counterfeit, clone
#9This affects temperature sensors/parts bought from un-official distributors like ebay or AliExpress, not digikey, farnel, etc. Perhaps I've been too lucky in my career and practiced EE for work, but who would you ever go to ebay instead of digikey?? Digikey certainly has a premium, but their speciality is small numbers/cut tape/etc and they have a small order size which makes them ok for hobby work, and I've used the…
Another professional EE here.
I never expect random chips bought off AliExpress/eBay/Amazon/etc to work, much less be genuine. I do expect breakout modules and the like to work, though I don't expect them to contain genuine parts. (That implies I'd never source from these places when it's a critical function.)
I'm always surprised when people expect grey-market crud to perform just as well as top-dollar stuff....
Re: Your DS18B20 temperature sensor is likely a fake, counterfeit, clone
#10This affects temperature sensors/parts bought from un-official distributors like ebay or AliExpress, not digikey, farnel, etc. Perhaps I've been too lucky in my career and practiced EE for work, but who would you ever go to ebay instead of digikey?? Digikey certainly has a premium, but their speciality is small numbers/cut tape/etc and they have a small order size which makes them ok for hobby work, and I've used the…
I’m sure these things have made it into a lot of those Arduino beginner kits and stuff like that. It really makes me mad because the various incompatibilities with the datasheet might frustrate a beginner or mislead them to think they are doing something wrong.