This circuit was found in General Electric's 1965 documentation. It appears elsewhere on the site. The SCR and the diodes must be in accordance with the motor current.
Similar metronome settings can be found at several points in this section. This was taken from a...
Using a CA3059 this circuit was found in the July 1995 Electronics Now magazine. The triac must be...
The circuit seen in the figure can generate triangular, sinusoidal, and rectangular signals of...