This 3-digit circuit was found in the 1992 special edition of the Radio Electronics Handbook. The circuit produces a standard voltage for bench testing.
I found this circuit in a 1998 publication, but as all components are common, it can be easily...
The circuit shown in the figure can be used as an indicator of presence and high voltage in a...
The LM381 integrated circuit is not very common today. The circuit is from an old publication, but it can be...