▁delay ▁tim ers ▁were ▁sold ▁Nation wide . ▁ ▁Short ly ▁there after ▁the ▁first ▁micro processor ▁based ▁delay ▁box ▁timer ▁was ▁introduced ▁by ▁Richard ▁Be ut n ag el ▁( Th orn ▁Mic ros ystem s ▁in ▁Ro chester , ▁NY ). ▁ ▁Richard ▁Be ut n ag el ' s ▁design ▁also ▁used ▁a ▁quart z ▁cry stal ▁time ▁base ▁for ▁accuracy ▁but ▁without ▁the ▁T TL ▁gl ue ▁logic . ▁The ▁Th orn ▁Mic ros ystem s ▁unit ▁util ized ▁a ▁single ▁chip ▁micro comput er ▁from ▁Intel , ▁a ▁profession ally ▁fabric ated ▁double ▁s ided ▁printed ▁circuit ▁board ▁with ▁pl ated ▁through ▁holes , ▁large ▁B CD ▁thumb w heel ▁switch es , ▁and ▁rug ged ▁solid ▁state ▁b ip olar ▁output ▁circuit ry ▁( no ▁elect rome chan ical ▁relay ). ▁ ▁The ▁Th orn ▁Mic ros ystem s ▁design ▁reduced ▁parts ▁count ▁to ▁" one ▁chip " ▁and ▁one ▁power ▁trans istor ▁substantial ly ▁reduced ▁PC B ▁( print ed ▁circuit ▁board ) ▁sol der ▁inter conne ctions ▁for ▁a ▁significant ▁enh ancement ▁in ▁reli ability . ▁The ▁firm ware ▁embedded ▁within ▁the ▁Intel ▁micro controller ▁chip ▁performed ▁all ▁the ▁timing ▁and ▁control ▁functions ▁required ▁of ▁the ▁delay ▁box ▁with ▁quart z ▁cry stal ▁digital ▁accuracy . ▁ ▁Many ▁new ▁T TL ▁and ▁C M OS ▁gl ue ▁logic ▁designs ▁continued ▁appearing ▁on ▁the ▁market ▁for ▁several ▁more ▁years . ▁Names ▁like ▁Me zi ere , ▁Term in ator , ▁K & R , ▁AT I