Morse code & printer port on computer.
Few weeks back I created a simple C program that sends an input string to
the standard parallel port.
It utilizes the inbuilt functions that enable me to send morse code over the SPP,
this one is a bit slower,with an exception that before the start & after the end of
message it transmitts '$' signal.It runs on DOS only,as it includes DOS.H header file.
The code is as follows.
you can attach any kind of RF circuit or a laser to the data pin 'D0' of the parallel port,
be sure to connect a 470 OHM or higher resistance in series with it, to ensure that it works properly
& dose'nt damages the port meanwhile too.
If you had'nt any previous hands on experience with the parallel port or any such kind of thing,
I will suggest you to go through some reading on the same before you touch the back of your computer.
STANDARD PARALLEL PORT IS VERY SENSITIVE COMPONENT & CAN GET DAMAGED EASILY IF NOT HANDLED PROPERLY.
