The purpose of this circuit is to monitor the output voltage of a power supply. The under and over voltage indicator was found in the August 1991 Radio Electronics magazine.
The figure shows how to use an oscilloscope for diode test. The circuit presents the...
We found this circuit in the October 1991 issue of Radio Electronics magazine. The circuit uses...
This circuit was obtained from an English magazine from 1977. It is a toy musical instrument that...