This converter may help if just the serial port on a personal computer is free, whereas the printer needs a parallel (Centronics) port. It converts a serial 2400 baud signal into a parallel signal.

[Felipe Navarro] wanted to add a few serial ports to his computer, but couldn’t find an adapter that suited his needs. So, he built his own. His Quad Serial device is a nicely designed converter that ...

This is a small portable RS232 – TTL converter circuit that is based on one of the most common ICs MAX232. The minimum number of components are used to operate MAX232. Additionally a +5V voltage ...