Isolated USB - UART Converter for Arduino pro mini from DUPPA on Tindie
USB UART 2 click - provides USB isolation | MikroElektronika
Debug Board USB to RS232 Isolated Serial Converter from DUPPA on Tindie
Mini Ft232 Isolation Serial Port Module Usb To Ttl Usb To Serial Port Magnetic Isolation Ft232rl Photoelectric Isolation - Demo Board Accessories - AliExpress
USB-C to Serial Port UART Board Isolated USB to TTL Module TYPE-C Download | eBay