The figure shows how to implement an alarm buzzer in an LM3914 to warn about crossing the scale limit. The circuit can use other types of warning.
This decoder TTL circuit for 15-channel remote control was found in Selezione Radio, Italian...
This is the circuit of a sensitive voltmeter using a difficult-to-obtain 5 uA full-scale...
This circuit compares two light intensities, providing the indication on an analog instrument. The...