The chips inside #1: Arduino Uno clone
Following from my previous post about the Uno clone that had a CH340C which I've promptly destroyed by decapping, clearly there was some unfinished business with that board. Haven't you wondered how they're able to sell them so cheaply? Do they use the fakest chips imaginable to get the price down?
Well, actually, the main chip seems totally legit and the only one that I'd suspect to be fake is the LM358, which has a TI logo but doesn't look the same as a known-genuine part (decapped by zeptobars), but rather very much like its suspected clones. Given its simple function on this board, in this case I'd be fine with using any dodgy part that works, but I don't like that it seems to be just pretending to be from a reputable manufacturer.
The "662K" part marking on the sot23 seems to be what some sellers use interchangeably with "XC6206", both of which apparently are names used by several manufacturers for interchangeable parts, but what was inside mine looks nothing like what zeptobars decapped. The interesting bit about these parts specifically is that some manufacturers seem to have given up completely on putting any distinguishing logo on the chip and are just using a tiny marking like "662k". Makes me wonder if they're saving cost on the laser engraving machine (and its time perhaps) in order to compete with price, or if it's an attempt to break the illusion of the logo having any meaning when rebadging is commonplace and to encourage a tighter supply chain if you're looking for a specific part. Disclaimer: Decapping and especially cleaning all of these chips took a long time and I'm not 100% sure if I haven't misplaced any of the chips as they were being handled, since this was before I've bought a label printer and started using it everywhere.