We know, you’ve already got a USB to serial adapter. Probably several of ... There’s also a 3.3 V regulator on board that you can use to power external circuits, as well as breakouts for ...

The circuit draws power from the USB bus ... We used version 2.3 of Microchip’s USB stack to create a USB serial port using the default drivers already available on most systems.

Also known as an RS-232 port, serial ports provide very slow speeds and have been superseded by USB on desktop computers. USB-to-serial adapters are available for old peripherals. DB (D-Sub ...