•  
  •  

Audio level meter (vumeter)

This circuit uses just one IC and a very few number of external components. It displays the audio level in terms of 10 LEDs. The input voltage can vary from 12V to 20V, but suggested voltage is 12V.

The LM3915 is a monolithic integrated circuit that senses analog voltage levels and drives ten LEDs providing a logarithmic 3 dB/step analog display. LED current drive is regulated and programmable, eliminating the need for current limiting resistors.

The IC contains an adjustable voltage reference and an accurate ten-step voltage divider. The high-impedance input buffer accepts signals down to ground and up to within 1.5V of the positive supply. Further, it needs no protection against inputs of ±35V. The input buffer drives 10 individual comparators referenced to the precision divider. Accuracy is typically better than 1 dB.

If there are any problems please contact webmaster@electronic-circuits-diagrams.com

Please share & like


Ross Carbonite vision mixer mainframe with 2x PSU, 24x inputs, 12x outputs  1ME  picture

Ross Carbonite vision mixer mainframe with 2x PSU, 24x inputs, 12x outputs 1ME

$3318.96



DIABLO PN 029 NSN 6130-00-346-6842 15V POWER SUPPLY SERIES 30 DISK selectvintage picture

DIABLO PN 029 NSN 6130-00-346-6842 15V POWER SUPPLY SERIES 30 DISK selectvintage

$395.00



Agilent 16702B Logic Analyzer Mainframe Touchscreen w/ Opt 003 TESTED picture

Agilent 16702B Logic Analyzer Mainframe Touchscreen w/ Opt 003 TESTED

$324.97



United Technologies/Hamilton Mainframe/Brake Power Supply Assembly HT206020-1 picture

United Technologies/Hamilton Mainframe/Brake Power Supply Assembly HT206020-1

$2369.95



TOLLBRIDGE 800050 T1 INTERFACE MODULE 4-PORT FOR PXI MAINFRAME picture

TOLLBRIDGE 800050 T1 INTERFACE MODULE 4-PORT FOR PXI MAINFRAME

$29.50