This circuit is from an October 1980 Radio Electronics magazine. The circuit indicates when the maximum voltage range set by the LM3914 exceeds its end.
The circuit shown is from an old European publication. In it we have the way to activate a relay...
We found this circuit in a European publication from the 1990s. Transistors are still common types...
This circuit was found in an American documentation and can be added to common amplifiers of any...