Found in the May 1988 issue of Radio Electronics magazine, this circuit is sensitive to small variations in input voltage. The power supply must be symmetrical.
Standing wave ratio or SWR is an important measure of whether all power from a transmitter is being...
This circuit is from 1976 Radio Shack documentation. It detects when rapid variations in the light...
This circuit was found in an Electronics Now of the 90s. It is intended for amplifying composite...