This filter was found in a Texas Instruments manual based on an operational amplifier 741. Other operational can be used and, with the indicated components, the rejection frequency is 2 kHz.
This is the traditional configuration of an AC amplifier using the 741 integrated circuit. I found...
This article is old, from 1994. But, for those who have an old PC and want to use a joystick from...
This simple circuit indicates when the two channels of stereo equipment are balanced. The diodes can...