Dot/Bar Display Driver-LM3914 (Linear) in Pakistan

This is the LM3914 Dot/Bar display analog-controlled LED driver that uses an alinear output scale. With this driver 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). Hook them up properly, and you can create all sorts of nifty multi-LED displays.

The LM3914 is very easy to apply as an analog meter circuit. A 1.2V full-scale meter requires only 1 resistor and a single 3V to 15V supply in addition to the 10 display LEDs. If the 1 resistor is a pot, it becomes the LED brightness control. The simplified block diagram illustrates this extremely simple external circuitry.



Drives LEDs, LCDs or Vacuum Fluorescents
Bar or Dot Display Mode Externally Selectable
Expandable to Displays of 100 Steps
Internal Voltage Reference from 1.2V to 12V
Operates with Single Supply of Less than 3V
Outputs can Interface with TTL or CMOS Logic

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