This circuit with the PLL4046 was found in the October 1994 Electronics Now magazine. The transistor is low power, and the volume obtained is small.
This circuit was taken from an article in Electronics Now magazine in February 1995. The power...
This circuit is from Mullard 1969 documentation. The circuit operates at a relatively high supply...
This circuit was found in a 1963 magazine, but can still be easily assembled with some current...