Sudhaker,
OPTO-ISOLATOR is a great idea if u r willing to interface the DC
circuit with some other device... but if U want to make the whole
system stand alone, u can surely avoid them to make whole setup
cheaper...
Cheaper yes but when 'talking' to 120 VAC power line safety is another
factor. As for the pulsing the devices, depending on what kind of controls
are used they'd be pulsed anyway. The program would run in a loop and pulse
each device with whatever it's supposed to be, on or off.
The rate would depend on the clock rate.
Jim
