•  
  •  

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


Fully Jarvis Programmable Memory Handset picture

Fully Jarvis Programmable Memory Handset

$39.99



NEW Fanuc A87L-0001-0215#004GB Compact Flash Memory Card picture

NEW Fanuc A87L-0001-0215#004GB Compact Flash Memory Card

$307.51



Aloudy Ergonomic Memory Foam Office Chair Armrest Pads, Comfy Gaming 2 per Pack picture

Aloudy Ergonomic Memory Foam Office Chair Armrest Pads, Comfy Gaming 2 per Pack

$16.00



2xArmrest Pad Memory Foam Comfy Office Chair Arm Rest Cover for Elbows picture

2xArmrest Pad Memory Foam Comfy Office Chair Arm Rest Cover for Elbows

$10.71



2 - RAM DRAM Tray-Container Box For Server PC Memory DIMM Modules - Fits 100 NEW picture

2 - RAM DRAM Tray-Container Box For Server PC Memory DIMM Modules - Fits 100 NEW

$19.99