Hi guys. Totally n00b so go easy.
I bought this USB-to-serial adapter (see atachments). It uses the Prolific PL2303 XA/HXA chipset. I am attempting to use it to communicate with my bricked routers serial port. The problem is i noticed the TXD and RXD lines output at 5V level. My router only wants the TXD, RXD, and GND pins to be connected..the router has a 3V3 pin line too but i am told not to connect to that pin from the USB-serial adapter. When i use my mulitmeter to measure voltage level i see my router's TXD and RXD lines read at 3V3 volts. So i want my USB-serial adapter's TXD and RXD pins to also be outputing at 3V3 volts otherwise the fear is the serial connection wont work or worse, it damages my already bricked router.
Does anyone know how to mod this adapter with just a solder gun so that the TXD and RXD lines output at 3V3 levels instead of its current 5V?
I would hate to have to use some voltage regulator module in between the TX to router and RX to router pins (if that is how it works) just to drop the 5V to 3.3 because where i am located it would require me ordering one which could take a few weeks or more. Ideally, i would like to get this solved with what i have with me which is simple soldering tools.
If you need more pictures/closer view please ask. I will update this post within a few minutes.