This circuit was obtained from Dutch documentation from 1964. The components are of the time, but current equivalents such as BC548 to BC108 can be used.
This series and parallel sensor circuit was found in Popular Electronics from the 1990s. Any SCR...
Found in Precision Monolithics documentation from the 90's, this circuit equalizes octave signals...
A fourth version of a non-retriggerable monostable is shown in Figure. It is triggered by the...