I'm hoping someone can help us out with a particular problem:
We have a piece of equipment that can send logging data through a parallel port to a printer, or ASCII data through a serial port to a computer, but not both at the same time. The computer runs HyperTerminal for capturing the ASCII to a text file. The printer is an old dot-matrix for printing the log.
We want to be able to log to the printer and computer at the same time, so that the computer would be a redundant backup in case the printer jams or fails . The tested and working DB9 serial port connection to the computer is just three pins:
Pin2 - RXD
Pin3 - TXD
Pin5 - Ground
9600 baud, no parity, 8-bit, 1 stop-bit, no flow control
(Not sure if I even need the the RXD connected on the equipment-side, because it is only sending data, but haven't tested that yet.)
I was thinking to split the serial-out of the equipment with a simple "Y" adapter, so that one branch goes directly to the computer and the other branch goes to a serial-to-parallel converter for the printer. Would this work, or will I fry something? Maybe another option would be to split the parallel-out of the equipment so one branch goes directly to the printer and the other branch goes to a parallel-to-serial adapter.
Thanks for any help