This circuit was found in the October 1994 issue of Electronics Now magazine. The 40446 IC is a PLL that is not very common today. The circuit has two types of effects.
Found in RCA documentation two years 70, this circuit triggers an incandescent lamp at dusk. The...
Found in Popular Electronics from the 90s, this circuit is based on a PLL567 and employs high-end or...
This circuit was obtained in an English publication of 1977. The operational is of the type with...