<story><title>Your DS18B20 temperature sensor is likely a fake, counterfeit, clone</title><url>https://github.com/cpetrich/counterfeit_DS18B20</url></story><parent_chain><item><author>as-j</author><text>This affects temperature sensors&amp;#x2F;parts bought from un-official distributors like ebay or AliExpress, not digikey, farnel, etc. Perhaps I&amp;#x27;ve been too lucky in my career and practiced EE for work, but who would you ever go to ebay instead of digikey?? &amp;lt;mind blown&amp;gt;&lt;p&gt;Digikey certainly has a premium, but their speciality is small numbers&amp;#x2F;cut tape&amp;#x2F;etc and they have a small order size which makes them ok for hobby work, and I&amp;#x27;ve used them for small production runs when I didn&amp;#x27;t want to end up with a ton of excess materials.&lt;p&gt;Makes you wonder what other junk is out there, and what purchasing guy figured he&amp;#x27;d save $10 and get it from ebay...?</text></item></parent_chain><comment><author>tgsovlerkhgsel</author><text>I live outside the US.&lt;p&gt;Both Digikey and Mouser will charge me $20+ to ship anything (tried with a small capacitor). Farnell will let me put stuff in the shopping cart, then when I select &amp;quot;individual&amp;quot; as the customer type, tells me that they only ship to companies and redirects me to a &amp;quot;partner site&amp;quot; for individuals, which promptly fails to load (things like this have conditioned me to avoid official distributors). RS will gladly sell me 4000 of those capacitors.&lt;p&gt;For a hobbyist outside of the US, AliExpress is often the only realistic source aside from the local RadioShack equivalent which probably doesn&amp;#x27;t have what you need.</text></comment>
<story><title>Your DS18B20 temperature sensor is likely a fake, counterfeit, clone</title><url>https://github.com/cpetrich/counterfeit_DS18B20</url></story><parent_chain><item><author>as-j</author><text>This affects temperature sensors&amp;#x2F;parts bought from un-official distributors like ebay or AliExpress, not digikey, farnel, etc. Perhaps I&amp;#x27;ve been too lucky in my career and practiced EE for work, but who would you ever go to ebay instead of digikey?? &amp;lt;mind blown&amp;gt;&lt;p&gt;Digikey certainly has a premium, but their speciality is small numbers&amp;#x2F;cut tape&amp;#x2F;etc and they have a small order size which makes them ok for hobby work, and I&amp;#x27;ve used them for small production runs when I didn&amp;#x27;t want to end up with a ton of excess materials.&lt;p&gt;Makes you wonder what other junk is out there, and what purchasing guy figured he&amp;#x27;d save $10 and get it from ebay...?</text></item></parent_chain><comment><author>exmadscientist</author><text>Another professional EE here.&lt;p&gt;I never expect random chips bought off AliExpress&amp;#x2F;eBay&amp;#x2F;Amazon&amp;#x2F;etc to work, much less be genuine. I do expect breakout modules and the like to work, though I don&amp;#x27;t expect them to contain genuine parts. (That implies I&amp;#x27;d never source from these places when it&amp;#x27;s a critical function.)&lt;p&gt;I&amp;#x27;m always surprised when people expect grey-market crud to perform just as well as top-dollar stuff....</text></comment>