The sound of drums can be obtained with these two touch-triggered double-T oscillators. The circuit is from a Radio Electronics Special projects from 1993.
This circuit was found in the July 1969 issue of Radio Electronics magazine. It also appeared in...
We found this circuit in the August 1994 Electronics Now magazine. The circuit is based on the...
This 4.5 MHz oscillator, or according to the crystal, was found in American documentation from the...