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 an Electronic Design from the 90s. The integrated circuit is from that...
This circuit is from a 1980 publication. In it we have a half-wave power control in which the SCR...
We found this circuit in a Radio Electronics from February 1966. The transistor is from the time...