This circuit was found in a 90s Popular Electronics. With it, using a 4066, it is possible to control between 1 to 100 the gain of an operational amplifier like the 741.
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
This 50's receiver includes an amplifier stage with a transistor complementary to the CK722, in...
Found in Popular Electronics from the 90's, this circuit makes use of components from the time. |...