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Description: This is the LM3916 Dot/Bar display analog-controlled LED driver that uses a more logarithmic/VU scale, which makes it well-suited to audio applications like VU meters. 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.

Audio applications include average or peak level indicators, and power meters. Replacing conventional meters with an LED bar graph results in a faster responding, more rugged display with high visibility that retains the ease of interpretation of an analog display.

The LM3916 is extremely easy to apply. A 1.2V fullscale meter requires only one resistor in addition to the ten LEDs. One more resistor programs the fullscale anywhere from 1.2V to 12V independent of supply voltage. LED brightness is easily controlled with a single pot.

Features:

  • Fast Responding Electronic VU Meter
  • Drivers LEDs, LCDs, or Vacuum Fluorescents
  • Bar or Dot Display Mode Externally Selectable
  • Expandable to Displays of 70 dB
  • Internal Voltage Reference from 1.2V to 12V
  • Operates with Single Supply of 3V to 25V
  • Directly Drives TTL or CMOS

Documents:

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Customer Comments

  • You forgot to add that they’re stackable. You can stack two or three together and get a larger bargraph. Old technology from the 80s or so. Popular electronics even had an article for a digital Spectrum analyzer using these..

  • these are even used in medical devices and because they can be daisy chained quite easy with no code, just some “for me” mid level math and your good to go, i have built a few of the 3914 to see the voltage drop in cars i have had, it can be set for 13.8 and have a variance of only a few volts so i could see the failing voltage regulator and replace that before getting a tow truck, even though it’s 80’s tech they are still awesome devices to play with and have them in smd packages so they still stay relevant in today’s toys

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