The LM3915 is a monolithic integrated circuit that
senses analog voltage levels and drives ten LEDs,
LCDs or vacuum fluorescent displays, providing a
logarithmic 3 dB/step analog display. One pin
changes the display from a bar graph to a moving dot
display. LED current drive is regulated and
programmable, eliminating the need for current
limiting resistors. The whole display system can
operate from a single supply as low as 3V or as high
as 25V.
LM3915 Dot/Bar Display Driver Datasheet
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