Lm3914. Juried engineering lm3914n 1 lm3914 dot bar graph display driver with built in regulated and programmable led current drive eliminating ext resistors dip 18 dip18 pack of 10 24 18 2 42 item. 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. And then we connect pin 2 v to ground. It can drive up to 10 leds lcds or vacuum fluorescent displays on its outputs.
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With these chips all it takes is a single analog signal to drive a string of 10 leds which can be configured into either bar mode where all leds below a certain point turn on or dot mode with only a single led on at a time. Introduction the lm3914 and lm3916 are a two ics in a series of monolithic analog controlled led drivers. The simplified lm3914 block diagram is to give the general idea of the circuit s operation. The input voltage for lm3914 can vary from 3v to 18v.
