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LM3914 - Versatile and Easy use Display (LM3914)

2016-12-13 13:43  
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The LM3914 is a monolithic integrated circuit that senses analog voltage levels and drives 10 LEDs, providing a linear analog display. A single pin changes the display from a moving dot to a bar graph. Current drive to the LEDs is regulated and programmable, eliminating the need for resistors. This feature is one that allows operation of the whole system from less than 3V.


Drives LEDs, LCDs or vacuum fluorescentsBar or dot display mode externally selectable by userExpandable to displays of 100 stepsInternal voltage reference from 1.2V to 12VOperates with single supply of less than 3VLED driver outputs are current regulated, open-collectors

The circuit contains its own adjustable reference and accurate 10-step voltage divider. The low-bias-current input buffer accepts signals down to ground, or V-, yet needs no protection against inputs of 35V above or below ground. The buffer drives 10 individual comparators referenced to the precision divider. Indication non-linearity can thus be held typically to ½%, even over a wide temperature range.

My LM3914 Circuits


Millivolt Meter using a LM3914 LED Dot Display

Circuits and Projects of LM3914


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