...traditional billboards, point-of-sale displays, and other static signage, digital signage has emerged as a great new way to catch the attention of an audience constantly on the move. The benefits are significant and ultimately digital signage can ge...

...current across a conductor, created by a difference in potential between two grounded points, as in two buildings connected by a run of RS-232 or other data line. When two devices are connected and their potentials are different, voltage flows from...