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Constructing Voltmeter Monitor Circuit using LM3914

2015-01-24 20:23  
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With a few resistors, LEDs and using a LM3914 bar/dot display driver IC we can construct a simple5V Voltmeter Monitor Circuitwhich provides TTL-compatible undervoltage and overvoltage warning signals. A complete circuit can be shown in the schematic below.

lm3914 voltmeter circuit and datasheet

Thisvoltmeter monitor circuitis useful where quick and easy voltage adjustments must be made. It may be applied where the overvoltage and undervoltage warning signals provide an attractive extra and also can be used to monitor any higher voltages, positive or negative.


Complete explanation onConstructing Voltmeter Monitor Circuit using LM3914can be seen here in full pdf (source: national.com)