Bargraph display drivers national semiconductor lm3914vnopb linear dot bar display driver 10 segments 5v to 20v supply voltage 0 to 70c 20 plcc case the lm3914 is a monolithic integrated circuit that senses analogue voltage levels and drives 10 leds providing a linear analogue display drives leds lcds or vacuum fluorescents bar or dot display mode externally selectable by user expandable to displays of 100 steps national semiconductor lm3914vnopb led bar dot display driver 3