the part TLP521-4x in "parts - lcsc(official) - optocoupler(smd)"
have the wrong package, its written "sop-16".
sop-16 its suppose to be 10mm long and TLP521-4 mesure 20mm
Our website uses essential cookies to help us ensure that it is working as expected, and uses optional analytics cookies to offer you a better browsing experience. To find out more, read our Cookie Notice
Brand new interactions and interfaces. 
Easy to use and quick to get started. 