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.
This circuit is from old European documentation. R1 depends on the output voltage of the...
This circuit can be used in an experimental link for educational purposes. based on an integrated 4093....
This circuit provides just over ½ W to a small speaker. We found this configuration in an old...