This circuit was obtained in an Electronic Design from the 80's. It has the adjustment of the gain through a simple potentiometer. The power supply must be symmetrical.
Found in an old Popular Electronics this circuit can also be adapted to be used as a shield. In...
Found in a 1967 RCA documentation, this AC power grid contactor can be fitted with modern...
) The phasor is the ray weapon that we see in many science-fiction films. The characteristic sound can be...