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LM3914N-1 – Bar Graph LED Driver

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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.

View Datasheet