The circuit shown was found in the 1994 National Semiconductor's Linear Application Handbook. The op amp admits equivalents and the power supply must be symmetrical.
This assembly circuit using a small motor as a generator was found in Radio Electroics magazine from...
The operational amplifier taken as an example is uncommon today, but the configuration can be made...
This simple TTL circuit generates sequences of musical notes that can be determined by adjusting R5 and...