This circuit was found in the March 1980 issue of Radio Electronics magazine. It is based on the newly released LH2400. The circuit must be powered by a symmetrical power supply.
The purpose of this circuit is to enable testing of transistors using a common multimeter. With the...
Using the LM3909 this circuit was found in the January 1992 issue of Radio Electronics magazine....
The circuit shown in the figure is recommended for applications where a visual indication is...