These are the instructions for using the test source code for the k74 pc relay board (using linux ubuntu). This code will cause all eight relays to activate so you can test your board.

First, download the program from the Web.

Then open a terminal & change to the directory you saved the file in. Compile it using:  gcc ./lpt.c -o2 -o ./lpt
(this will compile the file so you can run it)

After that you will need root privileges, so from the terminal type:  sudo ./lpt

This will prompt for password. Enter your root password and that should do it!

[This was wrote for C. We encourage you to have fun - play with it feel & free to change it, add to it or whatever you want.]