This project is an interface board to connect two USB controllers to the DB9 controller ports of an Atari ST/Amiga system. This is a sequel to the "USB Controller adapter" project : it provides two ...

DB9 to RJ45, USB to TTL (FTDI), and null modem/rollover adapters. The adapter circuit in this repo carries an inexpensive CPL2102 USB breakout board, cheap and plentiful on eBay, and exposes ...

Faced with a CNC that took instructions over serial port, and not wanting to deal with the cabling involved in a serial to USB adapter ... 5 mm headphone jack to DB9 adapter which he describes ...