LM3914N-1 – Bar Graph LED Driver

LM3914N-1 – Bar Graph LED Driver

With this chip, 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, like an audio-visualizing VU meter.

LM3914N-1 Pin Configuration:

Specifications:

• 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
• Input Withstands ±35V without Damage or False Outputs
• LED Driver Outputs are Current Regulated, Open collectors.
• Outputs can Interface with TTL or Cmos Logic.

Very Important: Please make sure you double check the polarity of all connections before attaching any power.

Please Note: DIY electronics are meant for those with basic electrical knowledge and soldering skills.

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