This circuit for multiple sound inputs was found in a Radio Electronics from January 1992. It consists of a Bargraph connected to a multi-input mixer.
This circuit appears elsewhere on this site. The CMOS gate can be any one, including NAND and NOR...
This conventional oscillator with the 741 can be precisely adjusted to produce a 400 Hz signal. The...
This circuit was found in a 90’s Electronic Engineering. The signal is sinusoidal with the...