Pl2303 Usb Serial Schematic Diagrams: A Complete Guide for Beginners

So this seems like a simple nullmodem cable for Yaesu radios. From my previous analysis I knew that the original SCU-19 contains a pl2303 USB serial adapter along with a level shifter. So I used half of the CT-168 cable with a Logilink AU0002E USB serial adapter based on a pl2303 chip. It obviously has to be a USB serial adapter with level shifters to RS-232 levels. So a plan pl2303 will not work. Please note that I did not test other USB serial chips (FT232 / CH340).

Pl2303 Usb Serial Schematic Diagrams

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One still open question was whether the ADMS-8 programming software for FT-2D explicitely checks for pl2303 USB serial devices or if it would works with any USB serial adapter. In order to test this I wired up the half CT-168 to a D-Sub 9 connector and connected it via a Digitus DA-70156 to the windows machine. After selecting the corresponding COM port it would read and write the FT-2D just fine. So you can use any USB serial adapter ant not only pl2303 based ones. Beware that you need RS-232 levels meaning a level shifter (e.g. MAX211) is required. So simple USB serial boards with only FT232 on it will not work. 2ff7e9595c