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 a Popular Electronics from the 90s. The circuit uses a general purpose...
This simple oscillator with a photocell was found in a Radio Electronics from January 1965. The...
Nothing more useful on the bench than a variable voltage source. This is the source we found in...