The purpose of this circuit found in the September 1977 issue of Radio Electronics magazine is to produce the vibrato effect. It is a phase shift circuit working with common operating systems.
This circuit was obtained from an English magazine from 1977. The magazine no longer exists, but...
The two damped oscillators shown can be adjusted to generate the drum sound when we touch the...
Timings of up to 10 hours, depending on the capacitor used, can be obtained with this circuit that...