A system for notification and management of item disposal is useful to provide a passive means of detecting the disposal of an item, association of disposal characteristics with the item, creation of disposal events with user based criteria, and support for subscription to notifications based upon the disposal events. In an embodiment, a single clock signal drives the elements in both the scan chains, and the start and end of the non-overlapping durations are timed associated with the edges of the pulses of the clock signal. The absorbent strip and contact detection pad are adhered to a support. A laser trimming technology is introduced to form an open circuit over the coding circuit, in order to set a code. The dummy gate electrodes are used as masks and determine the spacing between gate regions and sourcedrain regions, the width of the gate regions, and the spacing between adjacent gate regions according to some embodiments, thereby forming an accurately dimensioned transistor channel.