An illumination device includes a plurality of light source blocks defined by a first partition wall and a second partition wall, the light source blocks being provided with LEDs. An inline detector and blocker apparatus implements a detection algorithm to monitor DNS response packets and detects a DNS cache poisoning attack utilizing the detection algorithm. The sheet separating pad cooperates with a sheet separating roller to separate a paper sheet fed into a sheet-guiding path of the auto document feeder. The materials are cut into pieces 1000 which are sized and shaped to resemble flower petals, confetti 1200 or a petal 1300 made to spiral down to the ground like a falling maple seed. A first feedback circuit is coupled between the first active component and a common node, while a second feedback circuit is coupled between the second active component and the common node such that an output signal at substantially twice the fundamental resonant frequency is obtained at the common node.