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August 15, 2015 - LM391x LED Meter circuit board

press the Add to cart button at the left to put a $4.00 LM391x LED meter circuit board in your Paypal shopping cart

The LM391x LED meter circuit board is intended to allow the experimenter to easily use the LM3914, LM3915 or LM3916 chips. This is NOT a kit, merely a circuit board. The reason for not including the LM391x chip, socket, LED array and LED socket is that they are quite expensive in small quantites. The LM3914 is a linear 10 LED meter chip, the LM3915 is a 3 db per step 10 LED meter chip and the LM3916 is a 10 LED VU meter chip. Minimal documentation is included, the experimenter should be able to build/apply the board using the TI (formerly National) LM3914 datasheet , LM3915 datasheet , LM3916 datasheet .

[LM391x LED meter circuit board picture - 
click for larger version]
  • circuit board for TI (formerly National) LM3914, LM3915 or LM3916 LED meter chips
  • possible to edge align the boards (after some sanding) for meters with 20 or 30 LEDs (with external circuitry)
  • board alone, parts are NOT included
  • board size: 1 by 1.5 inches
  • the schematic shows a simple meter I use with an LM3915 for audio
  • printed documents are NOT included, please print/view your own from the pdf files provided


  • The LM391x LED meter circuit board only is $4.00 + shipping/handling



    Documentation for LM391x LED meter board: download (Right click/save target as) and print the Schematic diagram and the parts placement diagram both in Adobe Acrobat (.pdf) format or text file.

    press the Add to cart button at the left to put a $4.00 LM391x LED meter board in your Paypal shopping cart
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    For larger quantity purchases, to combine with other items, for DX purchase price or for any other questions, please send an email to me, Chuck Olson, WB9KZY at:



    with your question or the items you want and we'll email you a Paypal invoice.



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