[SOLVED] USB To RS232 protection?

[firejim]

hi again,
Is there a circuit to make that you can avoid from burning the circuits when you have faulty connections? a circuit protection ?
This is the second time that I lost my rs232 to usb converter

 

[horace1]

depends on the isolation you require, e.g. the Maxim MAX3250
https://www.maximintegrated.com/en/products/interface/transceivers/MAX3250.html