LM3914 Dot-Bar LED Display Driver

Drives a row of ten LEDs from a single analogue input, lighting them progressively as the voltage rises - the classic VU meter or level bargraph. A pin selects dot mode, where only one LED lights, or bar mode, where all up to the level do. It includes its own adjustable reference and constant current LED drive, so no series resistors are needed. Chain several for a longer scale. Ten LED level display from one analogue input; Dot or bar mode selectable by one pin; Built-in constant current drive, no LED resistors needed; Cascadable for scales longer than ten steps