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 is a 6-transistor transistor receiver manufactured in the 60s. The circuit is a...
This circuit is from a 2005 Linear Technology publication. It converts current into load sensing...
The circuit in the figure is an amplifier with gain 10 for alternating signals using the 741. The...