This device has been designed to add a serial RS-232 output to my Telereader CD-670 decoder.
It takes the Centronics output data and send it to a 4800 Bauds 8 bits RS232 serial output.
A small modification has to be made on the CD-670 main printed board to power the converter
from the printer connector: pin 13 which is normally not connected has to be wired to the 5V
main board supply.
The PIC is clocked using a 3.579545Mhz Xtal in order to get the 4800 Bauds speed.