This circuit was found in a 90’s Popular Electronics. The circuit is used to analyze noise in vehicles. The output must be in a low impedance headset.
We find this circuit in a documentation for engineers from 1971. The circuit generates rectangular and...
This 1/2 hertz high selectivity filter was found in the December 1990 issue of Radio Electronics...
Connected to the low current input of a standard multimeter, this circuit enables the reading of...