•  
  •  

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

FCA635LCC NC controller set,tested good used ,Fast delivery,*zp
$3600.0 FCA635LCC   NC controller set,tested good  used  ,Fast delivery,*zp picture
1PC Keyence Sensor Fiber Optic Amplifier FS-V11 Used
$33.66 1PC Keyence Sensor Fiber Optic Amplifier FS-V11 Used picture
1PCS NEW FANUC A06B-6220-H026#H600 Servo Amplifier Free DHL or Fedex
$4217.97 1PCS NEW FANUC A06B-6220-H026#H600 Servo Amplifier  Free DHL or Fedex picture
FCA635LCCH Servo driver,NEW,Fast delivery,*zp
$4100.0 FCA635LCCH  Servo driver,NEW,Fast delivery,*zp picture
5 Pcs VTL5C Series VTL5C1/5C2 VTL5C3 DIP-4 Audio Amplifier Linear Opto-Coupler
$8.07 5 Pcs VTL5C Series VTL5C1/5C2 VTL5C3 DIP-4 Audio Amplifier Linear Opto-Coupler picture