Radar Detector
A simple detector of radar signals uses the junctions of the input transistors of an LM1458 op amp as RF detectors. The lead
s of CI act as an antenna and should be about 0.4" long measured from the IC package. Detected audio components are further amplified by IC1A and IC1B, and drive a piezo transducer. Mount the circuit so that incident RF energy will not be blocked.
-small.png "CMOS Circuits Tutorial")
characters left: