V. HARDWARE INTERFACING
It is also possible to control the devices connected to the
LPT parallel port using ARC. The data pins are turned low or
high through an application made in Visual Basic. "Inp" and
"Out" are used to receive and output signals on
the LPT.
ARC server calls the executables to send high and
low signals to parallel port. Circuit to glow LED is shown in
figure 7 [10]. The circuit to control home devices such as fans
is shown in figure 6 [12]. The load will be connected to relay