We found this circuit in the March 1999 issue of Electronics Now magazine. The indicator used is an analog type. The values indicated depend on the calibration.
This circuit was found in General Electric documentation from 1964. It makes use of a PUT, called the...
The circuit presented is suggested by National Semiconductor in its Linear Applications Handbook. The...
This is a small transistor receiver for the medium wave range made in Japan in the 1960s. The...