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 1985 documentation. It provides an audiovisual indication of the...
This transistorized shift register was found in a 1970s RCA documentation. The used transistors can...
We found this circuit in a 1965 General Electric manual. The components are from the period. Time...