An USB isolator aids eliminate floor loops and minimizes electromagnetic interference (EMI) involving the computer plus the connected system. 1x GND 3V3 (P2 with two pins 2.54mm) connector may be used to power externally the WCH CH569 MCU (it is suggested to eliminate the P4/SHUNT in that circumstance It isn't https://hydrabus40517.is-blog.com/39635513/5-simple-statements-about-hydrabus-explained