/diy/ - Do It Yourself

>>1791155
nice roll, try a CNC machine to test the keys lel
a cheap DMM is a must-have when working on electronics projects. but also if those are encoders at the right of the pic, they might not be in the off position at rest or their onboard pullups might be interfering

>>1791196
if international passenger aviation isn't running, it'll be a while. eBay expects about 2-3 weeks longer from China to the USA. better send via express courier

>>1791256
if it's nothing groundbreaking it's likely you haven't stretched their capabilities at all
one thing you should do for next time is to enter all those design rules (as applicable) into KiCAD's board setup and create a template out of the resulting project. you can call it something like "JLC 2layer regular"
in fact, you should enter all those design rules (as applicable) into KiCAD's board setup so that you can use the design rule checker (ladybug icon in pcbnew) to verify that your board will be manufactured correctly

>>1791352
did you solder the QFN down completely? are your inductor and output cap large enough?

>>1791403
they should be fine side-by-side. the microphonic effect is too weak to bother about, esp if you keep them from touching
you can always replace with greencaps if noise becomes a real issue