This circuit with the DCP010512 was found in the August 1998 issue of Electronics Now. The integrated circuit is not very common these days.
This FM detector circuit was found in a 1977 documentation. The circuit uses a 1977 Signetics...
This very simple circuit turns on an LED when an object interrupts the light that falls on the...
This 1970 Philips circuit uses a mechanical counter. The circuit is triggered by a reed switch...