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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. Features: • Drives LEDs, LCDs or Vacuum Fluorescents • Bar or Dot Display Mode Externally Selectable by User • Expandable to Displays of 100 Steps • Internal Voltage Reference from 1.2V to 12V • Operates with Single Supply of Less than 3V • Inputs Operate Down to Ground • Output Current Programmable from 2 mA to 30mA .No Multiplex Switching or Interaction Between Outputs