This circuit was found in a RE Experimenter Handbook from the 90's. The components are of the time, rare nowadays, except the 555 and 4017.
This circuit was obtained in an English publication from 1993, but it can still be assembled with...
This circuit was obtained from an English documentation from 1995. The operational amplifier can...
The circuit shown in the figure generates signals of 6 Hz and 1 Hz, which can be used in...