This circuit was found in the October 1994 issue of Electronics Now magazine. The 4046 PLL is not very common these days.
This alarm with NO and NC sensors was found in the January 1975 Radio Electronics magazine. The...
This circuit was obtained in the 1990 Motorola Linear Databook. The circuit uses a 139 series...
This circuit uses a 6-bit A / D converter from Philips, and has its output compatible with most...