This circuit uses an unusual PLL, the 4046 CMOS. We found it in the October 1994 issue of Electronics Now. The circuit also uses a 4093 gate as a trigger.
CMOS integrated circuits are sensitive to supply voltages in terms of signal propagation time....
This configuration was found in a 1976 documentation. Note the use of pin 4 input for reset. The...
This circuit was found in an American documentation from 1969. The circuit is a multi-indicator with...