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Ten-step linear LED display driver

LM3914 Working Principle

Learn how LM3914 works with an illustrated explanation and practical readings.

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LM3914 at a glance

Follow the labeled connections and functional stages

LM3914 working principle: illustrated functional stages, basic circuit and connections
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How it works

3 stages · Explore one step at a time

Step 1 / 3

Set the scale

RLO and RHI establish the ten-step comparison range.

Step 2 / 3

Compare the input

The buffer distributes SIG to ten comparators connected to the ladder taps.

Step 3 / 3

Drive the LEDs

Dot/bar logic selects current sinks; the reference load sets approximate brightness.

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