This circuit was obtained in a documentation from the 70s. The operational amplifiers used are uncommon today. Modern equivalent types can be tried out.
Found in Motorola documentation from the 1980s, this circuit employs an integrated device from...
This simple regenerative receiver for the medium wave range is from a 1956 Sylvania publication. Details...
This bidirectional motor control was found in an 80's Electronic Engineering. The circuit uses a...