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.
The circuit shown in the figure is suggested by Maxim (www.maxim-ic.com) and makes use of the...
We found this circuit in a Radio Electronics magazine from January 1975. The transistors are...
Found in documentation from the 1980s, this circuit can have several adaptations to use modern...