This circuit can use almost any operating system and has a high input impedance. The power supply must be symmetrical. The circuit was obtained in documentation from the 1980s.
The output voltage is adjusted by the trimpot. The power transistor mist be mounted on a heatsink. The 3.9...
Found in an old Popular Electronics this circuit causes a bicolor LED to alternate the colors of...
In a voltage follower the gain is unitary. Input impedance is too high and output impedance too low....