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.
Found in a Popular Electronics from the 90s, it applies to the old answering machines that used...
The operation of this circuit is not common today, but equivalents can be experienced. The circuit is...
This circuit was found in an English publication from 1989. The integrated circuits are of the...