An USB isolator assists remove ground loops and minimizes electromagnetic interference (EMI) amongst the computer as well as the related gadget. 1x GND 3V3 (P2 with 2 pins two.54mm) connector can be employed to energy externally the WCH CH569 MCU (it is suggested to remove the P4/SHUNT in that situation https://philx638pgx4.blogscribble.com/profile