The purpose of this circuit is to measure the intensity of audio signals. We found it in the September 1990 issue of Radio Electronics magazine. The circuit works as a S meter.
This circuit, which can only be used with incandescent lamps, is adapted to the common wall...
With this circuit it is possible to follow the transmission in the range of 2 meters with a...
Found in the June 1987 issue of Radio Electronics magazine, this circuit uses well-known CMOS...