This is the traditional voltage follower configuration with the 741 operational amplifier. The circuit is from 1976 documentation and the power supply must be symmetrical from 6 to 15 V.
This circuit can control two loads and is also equipped with a light sensor for its trip. The...
This circuit from an old Radio Electronics is used to connect headphones to the output of...
The circuit shown in figure is suggested by Maxim in an application note. The operational...