Despite being from a 1969 publication, the transistors used have current equivalents such as BC548 and BC558. The circuit generates signals from 1 500 to 20 000 Hz and 4 scales.
This circuit was found in an 1888 publication. However, since it uses common components, it can...
The input impedance of this circuit is about 700 k ohm and the output impedance is about 1 k ohm....
This circuit appeared in the 1991 Electronics Experimenter Handbook. The circuit is for remote...