This circuit is from Motorola's Linear Interface ICs from 1993. The MC1723 is the equivalent of the well-known 723. The transistor supports equivalents.
We found this simple music box circuit that can also be used in a musical bell in a 1991...
We found this circuit in the Radio Electronics magazine of May 1977. The circuit has the frequency...
This well-designed phase shift oscillator configuration was found in ancient European...