The machine is capable of dispensing up to 4 different color of golfball.
Above: The basic engineering of the machine is pretty much simple. IBM-PC, the parallel port, Solid State Relays and the program.
Above: The Software was develop using the basic golfball machine simulator. The simulator works and response the same with the real golfball machine. The software uses Software Development Life Cycle (SDLC) in order to achieve quality program. LINK TO MY WORK
Above: The basic IBM-PC parallel port diagram and usually address in 378-IN and 379-OUT.